"My Lord, enable me to be grateful for Your favor which You have bestowed upon me and upon my parents and to do righteousness of which You approve. And admit me by Your mercy into [the ranks of] Your righteous servants."

"Our Lord, grant us from among our wives and offspring comfort to our eyes and make us an example for the righteous."

"My Lord, grant me wisdom and join me with the righteous. And grant me a reputation of honor among later generations. And place me among the inheritors of the Garden of Pleasure."

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00971504825082

\[1 \star \]

A bundle of electrons moving at the speed of light carries an electric current of intensity \[0.2\;A\] in a wire of length \[5\;m\]. The number of electrons in the bundle equals \[C=3 × 10^8 m/s ,q_e=1.6 × 10^{-19} C \]

\[𝑛= 4.36 ×𝟏𝟎^{12} \;\;\;\;\;\;-C\]	\[𝑛= 2.08 ×𝟏𝟎^{10} \;\;\;\;\;\;-A\]
\[𝑛= 3.46 ×𝟏𝟎^{11} \;\;\;\;\;\;-D\]	\[𝑛= 5.97 ×𝟏𝟎^{13} \;\;\;\;\;\;-B\]

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\[2 \star \]

A wire with cross-sectional area \[A=5.2×10^{-6}m^2\] carries a current of \[i=2\;A\] and is made of copper with molar mass and density \[M=63.5\;\; g\;\;\;\;\;\;.𝜌=8960 \frac{Kg}{m^3}\] There is one conduction electron per atom. The drift velocity of the electrons equals Given \[ q=1.6 ×10^{-19}c\;\;\;\;\;\;Avogadro's\;\; number= 6.022 ×10^{23}\]

\[𝑣_𝑑= 5.6×𝟏𝟎^{−4}\;\; m/s\;\;\;\;\;\;-C\]	\[𝑣_𝑑= 6×𝟏𝟎^{−5}\;\; m/s\;\;\;\;\;\;-A\]
\[𝑣_𝑑= 4.3×𝟏𝟎^{−5}\;\; m/s\;\;\;\;\;\;-D\]	\[𝑣_𝑑= 2.8×𝟏𝟎^{−4}\;\; m/s\;\;\;\;\;\;-B\]

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\[3 \star \]

Two copper wires have the same length, are made of the same material, and are at the same temperature. They are connected in series. The radius of the first wire is twice the radius of the second wire. The ratio of the current density in the first wire to the second wire equals

\[\frac {j_1}{j_2}=0.25\;\;\;\;\;\;-C\]	\[\frac {j_1}{j_2}=4\;\;\;\;\;\;-A\]
\[\frac {j_1}{j_2}=2\;\;\;\;\;\;-D\]	\[\frac {j_1}{j_2}=0.5\;\;\;\;\;\;-B\]

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\[4 \star \]

A wire made of brass and a wire made of silver have the same length, but the diameter of the brass wire is four times the diameter of the silver wire. The resistivity of brass is 4 times greater than the resistivity of silver. If \[(RC )\] refers to the resistance of the brass wire and \[(RS )\] refers to the resistance of the silver wire, which of the following is correct?

\[R_C=0.5 R_S\;\;\;\;\;\;-C\]	\[ R_C=0.25 R_S\;\;\;\;\;\;-A\]
\[R_C=2 R_S\;\;\;\;\;\;-D\]	\[R_C= R_S\;\;\;\;\;\;-B\]

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RC=0.25 RS

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RC=2 RS

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\[5 \star \]

Four wires of the same type and at the same temperature One of the following wires has the least resistance

Wire 3-C	Wire 1-A
Wire 4-D	Wire 2-B

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\[6 \star \]

Two wires of the same material and at the same temperature, if \[\frac{R_1}{R_2}= \frac{2}{3}\] then one of the following answers satisfies this

\[L_1=\frac{1}{2}L_2 , A_1=\frac{1}{3} A_2\;\;\;\;\;\;-C\]	\[L_1=\frac{3}{4}L_2 , A_1=\frac{1}{2} A_2\;\;\;\;\;\;-A\]
\[L_1=3L_2 , A_1=2 A_2\;\;\;\;\;\;-D\]	\[L_1=\frac{4}{3}L_2 , A_1=2 A_2\;\;\;\;\;\;-B\]

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\[7 \star \]

A copper wire has a specific resistance of
\[1.7 \times 10^{-8} \;Ω.m\] at a temperature of 20°C. When the temperature is increased by 15°C, its specific resistance becomes \[1.82 \times 10^{-8} \;Ω.m\] The temperature coefficient of resistance equals

\[𝛼=5.6 × 10^{-3}\;K^{-1}\;\;\;\;\;\;-C\]	\[𝛼=21.7 × 10^{-3}\;K^{-1}\;\;\;\;\;\;-A\]
\[𝛼=4.7 × 10^{-3}\;K^{-1}\;\;\;\;\;\;-D\]	\[𝛼=2.6 × 10^{-3}\;K^{-1}\;\;\;\;\;\;-B\]

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\[8 \star \]

Four identical resistors are connected to a battery as shown in the figure above. Which of the following correctly represents the current passing through each resistor?

\[i_1>i_2=i_3>i_4 \;\;\;\;\;\;-C\]	\[i_2=i_3>i_1=i_4 \;\;\;\;\;\;-A\]
\[ i_1=i_2=i_3=i_4 \;\;\;\;\;\;-D\]	\[i_1=i_4 > i_2=i_3\;\;\;\;\;\;-B\]

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\[9 \star \star \]

Four identical resistors each with resistance \[4\; Ω\] are connected to a battery with potential difference \[6\;V\]as shown in the figure below. The ammeter reading equals

\[i= 3.5 \;\; A\;\;\;\;\;\;-C\]	\[i= 1.5 \;\; A\;\;\;\;\;\;-A\]
\[i= 4.5 \;\; A\;\;\;\;\;\;-D\]	\[i= 2.5 \;\; A\;\;\;\;\;\;-B\]

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\[10 \star \]

In the figure below, a circuit consists of three resistors
\[R_1=R_2=R_3= 4 Ω\] connected to a battery \[V = 6V\]. The ammeter reading equals

\[i= 3 \;\; A\;\;\;\;\;\;-C\]	\[i= 1 \;\; A\;\;\;\;\;\;-A\]
\[i= 4 \;\; A\;\;\;\;\;\;-D\]	\[i= 2 \;\; A\;\;\;\;\;\;-B\]

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\[11 \star \star \]

Based on the figure below, one of the following answers represents the potential difference across each resistor

\[V_1 = 3V\;\;\;\;\;\; ,\;\;\;\;\;\; V_2 = 6V \;\;\;\;\;\;,\;\;\;\;\;\; V_3 = 9V-C\]	\[V_1 = 9V\;\;\;\;\;\; ,\;\;\;\;\;\; V_2 = 9V \;\;\;\;\;\;,\;\;\;\;\;\; V_3 = 9V-A\]
\[V_1 = 1V\;\;\;\;\;\; ,\;\;\;\;\;\; V_2 = 2V \;\;\;\;\;\;,\;\;\;\;\;\; V_3 = 6V-D\]	\[V_1 = 4.5V\;\;\;\;\;\; ,\;\;\;\;\;\; V_2 = 4.5V \;\;\;\;\;\;,\;\;\;\;\;\; V_3 = 9V-B\]

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\[12 \star \]

A student connected switch \[S_1\] to terminal \[A\]and measured the current passing through the resistor \[1\;Ω\] then disconnected the switch then connected switch \[S_2\] to terminal \[B\] and measured the current passing through the resistor \[1\;Ω\]then disconnected the switch. The current passing through the resistor in each case

\[i_1= 3A \;\;\;\;\;\; ,\;\;\;\;\;\; i2 = 3A\;\;\;\;\;\;-C\]	\[i_1= 3A \;\;\;\;\;\; ,\;\;\;\;\;\; i_2 = 4A\;\;\;\;\;\;-A\]
\[ i_1 =2A \;\;\;\;\;\; ,\;\;\;\;\;\; i_2 = 3A\;\;\;\;\;\;-D\]	\[i_1=6A \;\;\;\;\;\; ,\;\;\;\;\;\; i_2 = 4A\;\;\;\;\;\;-B\]

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\[13 \star \]

In the adjacent figure, two circuits contain the same resistors and battery connected in the same way but with the resistors' positions changed. Which of the answers is correct?

\[ R_ {1eq } = R_ {2eq } \;\;\;\;\;\;-C\]	\[i_{1tot} = i_{2tot }\;\;\;\;\;\;-A\]
\[i_{1tot} > i_{2tot }\;\;\;\;\;\;-D\]	\[i_{2tot} > i_{1tot }\;\;\;\;\;\;-B\]

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\[14 \star \star \]

The equivalent resistance of the circuit below equals

\[R_eq = 4\;\; Ω \;\;\;\;\;\;-C\]	\[R_eq = 3\;\; Ω \;\;\;\;\;\;-A\]
\[R_eq = 3.5\;\; Ω \;\;\;\;\;\;-D\]	\[R_eq = 4.5\;\; Ω \;\;\;\;\;\;-B\]

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\[15 \star \star \]

Two equal resistors connected to a battery as shown in the figure. A third resistor was added in parallel to the same circuit. The power consumed in the circuit will:

Power increases - C	Power remains unchanged - A
Power decreases - D	Power becomes zero - B

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\[16 \star \star \]

In the figure below, the ratio between the power of the first circuit to the second circuit equals:

\[2\;\;\;\;\;\;-C\]	\[4\;\;\;\;\;\;-A\]
\[2.5\;\;\;\;\;\;-D\]	\[1.5\;\;\;\;\;\;-B\]

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\[17 \star \star \star \]

Three resistors connected in parallel. The value of the second resistor is increased by \[1Ω\] compared to the first resistor and the third resistor is increased by \[1Ω\] compared to the second resistor. The equivalent resistance was calculated to be \[9Ω\] Then the value of each resistor equals

\[R_1= 2 Ω \;\;\;\;\;\;, \;\;\;\;\;\; R_2= 3 Ω \;\;\;\;\;\; , \;\;\;\;\;\; R_3= 4 Ω-C\]	\[R_1= 18 Ω \;\;\;\;\;\;, \;\;\;\;\;\; R_2= 19 Ω \;\;\;\;\;\; , \;\;\;\;\;\; R_3= 20 Ω-A\]
\[R_1= 12 Ω \;\;\;\;\;\;, \;\;\;\;\;\; R_2= 13 Ω \;\;\;\;\;\; , \;\;\;\;\;\; R_3= 14 Ω-D\]	\[R_1= 26 Ω \;\;\;\;\;\;, \;\;\;\;\;\; R_2= 27 Ω \;\;\;\;\;\; , \;\;\;\;\;\; R_3= 28 Ω-B\]

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\[18 \star \star \star \]

Resistors connected as shown in the figure below Each has a resistance of \[ 9 Ω\] connected to a battery with a voltage of \[18V\] Then the ammeter reading equals

\[ 𝑖= 5 \;\;A\;\;\;\;\;\;-C\]	\[ 𝑖= 9 \;\;A\;\;\;\;\;\;-A\]
\[ 𝑖= 18 \;\;A\;\;\;\;\;\;-D\]	\[ 𝑖= 10 \;\;A\;\;\;\;\;\;-B\]

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\[19 \star \star \]

A circuit connected to a resistor \[4 Ω\] and a switch. A voltmeter connected across the circuit reads when the switch is open \[12V\] and when the switch is closed \[10V\]
Then the value of the battery's internal resistance equals

\[ 𝑟= 0.8\;\; Ω \;\;\;\;\;\;-C\]	\[𝑟= 0.5\;\; Ω \;\;\;\;\;\;-A\]
\[𝑟= 1.2\;\; Ω \;\;\;\;\;\;-D\]	\[𝑟= 1\;\; Ω \;\;\;\;\;\;-B\]

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\[20 \star \star \]

In the figure below, four resistors were connected to a battery
An ammeter and voltmeter were placed in the positions shown in the figure
Then the readings of the devices equal

\[ 𝑖= 4\; A \;\;\;\;\;\; ,\;\;\;\;\;\; 𝑉= 8\; V\;\;\;\;\;\;-C\]	\[ 𝑖= 6\; A \;\;\;\;\;\; ,\;\;\;\;\;\; 𝑉= 12\; V\;\;\;\;\;\;-A\]
\[ 𝑖= 2\; A \;\;\;\;\;\; ,\;\;\;\;\;\; 𝑉= 4\; V\;\;\;\;\;\;-D\]	\[ 𝑖= 5\; A \;\;\;\;\;\; ,\;\;\;\;\;\; 𝑉= 10\; V\;\;\;\;\;\;-B\]

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\[21 \star \star \].

A battery with a voltage of \[12V\] and internal resistance \[2Ω\] was connected to an unknown external resistor as shown in the figure below. The ammeter reading was \[i= 0.5 A\] Then the value of the external resistor equals

\[R= 10\;\; Ω\;\;\;\;\;\;-C\]	\[R= 16\;\; Ω\;\;\;\;\;\;-A\]
\[R= 12\;\; Ω\;\;\;\;\;\;-D\]	\[ R= 22\;\; Ω\;\;\;\;\;\;-B\]

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\[22 \star \star \star \]

Two resistors \[R_1>R_2\] The resistors were connected in two different ways. First, the resistors were connected in series so their equivalent resistance was \[9 Ω\] Then the resistors were connected in parallel so their equivalent resistance was \[2 Ω\] Then the value of each resistor equals

\[𝑅_1= 3\;Ω \;\;\;\;\;\; .\;\;\;\;\;\; 𝑅_2= 6\;Ω-C\]	\[ 𝑅_1= 1\;Ω \;\;\;\;\;\; .\;\;\;\;\;\; 𝑅_2= 8\;Ω-A\]
\[𝑅_1= 2\;Ω \;\;\;\;\;\; .\;\;\;\;\;\; 𝑅_2= 7\;Ω-D\]	\[𝑅_1= 4\;Ω \;\;\;\;\;\; .\;\;\;\;\;\; 𝑅_2= 5\;Ω-B\]

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\[23 \star \]

Two wires of the same material and at the same temperature as shown in the figure below If the length of the first wire is half the length of the second wire and the radius of the first wire is twice the radius of the second wire Then the ratio of the resistance of wire 1 to wire 2 equals

\[ 0.6\;\;\;\;\;\;-C\]	\[ 0.25\;\;\;\;\;\;-A\]
\[ 0.125\;\;\;\;\;\;-D\]	\[ 0.5\;\;\;\;\;\;-B\]

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\[24 \star \]

Which of the following graphs represents Ohm's law for a solid conductor at constant temperature?

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\[25 \star \]

The following graph shows the relationship between voltage difference and current intensity for an ohmic resistor Then the value of the resistance equals

\[R=0.6\; Ω\;\;\;\;\;\;-C\]	\[R=3.18\; Ω\;\;\;\;\;\;-A\]
\[ R=2.54\; Ω\;\;\;\;\;\;-D\]	\[R=1.67\; Ω\;\;\;\;\;\;-B\]

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\[26 \star \]

Two resistors \[R_1=6 Ω , R_2 = 12 Ω \] are connected in parallel with each other and in series with resistor \[R_3=2 Ω\]. The electric current was measured as shown in the figure below, where the current intensity \[I=3A\] flowing through resistor \[R_3\]. The applied voltage in the circuit equals:

\[V=12\; V\;\;\;\;\;\;\;\;\;\;\;\;-C\]	\[V=18\; V\;\;\;\;\;\;-A\]
\[V=16\; V\;\;\;\;\;\;\;\;\;\;\;\;-D\]	\[V=14\; V\;\;\;\;\;\;\;\;\;\;\;\;-B\]

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\[27 \star \]

Two resistors \[R_1=6 Ω , R_2 = 12 Ω \] are connected in parallel with each other and connected in series with resistor \[R_3=2 Ω\]. The electric current was measured as shown in the figure below, where the current intensity was \[I=3A\] flowing through resistor \[R_3\]. The current intensity passing through the \[12 Ω\] resistor equals:

\[I=1.2 \;A\;\;\;\;\;\;-C\]	\[I=1.5 \;A\;\;\;\;\;\;-A\]
\[ I=0.5 \;A \;\;\;\;\;\;-D\]	\[I=1 \;A\;\;\;\;\;\;-B\]

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\[28 \star \]

A wire with resistance \[ R = 5.5 Ω \] at temperature \[T=19^0 C\] and at temperature \[T=200^0\] its resistance becomes \[R=21.5 Ω \]. The temperature coefficient of the wire equals:

\[𝛼=0.016\;\; K^{−𝟏}\;\;\;\;\;\;-C\]	\[ 𝛼=0.024\;\; K^{−𝟏}\;\;\;\;\;\;-A\]
\[𝛼=0.056\;\; K^{−𝟏}\;\;\;\;\;\;-D\]	\[𝛼=0.041\;\; K^{−𝟏}\;\;\;\;\;\;-B\]

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\[29 \star \]

A copper wire has resistance \[R\] at temperature \[T=0^0C\] and its temperature coefficient is \[3.9×10^{-3} K^{-1}\]. At what temperature will its resistance be twice its original value?

\[T=324^0\;\; C\;\;\;\;\;\;-C\]	\[T=256^0\;\; C\;\;\;\;\;\;-A\]
\[T=127^0\;\; C\;\;\;\;\;\;-D\]	\[T=297^0\;\; C\;\;\;\;\;\;-B\]

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\[30 \star \]

In the figure below, the following lines were drawn for an ohmic resistor. The resistance value equals:

\[ R=1000 \; Ω\;\; ±5%\;\;\;\;\;\;-C\]	\[ R=2100 \;Ω \;\; ±5% \;\;\;\;\;\;-A\]
\[ R=3200 \; Ω \;\; ±1% \;\;\;\;\;\;-D\]	\[R=100 \; Ω \;\; ±1% \;\;\;\;\;\;-B\]

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\[31 \star \]

Three lamps connected in series as shown in the figure below
The resistance of each lamp is shown in the figure when the circuit is closed
One of the lamps has the highest brightness

Lamp C	Lamp A
All lamps have the same brightness -D	Lamp B

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\[32 \star \]

Three lamps connected in parallel as shown in the figure below
The resistance of each lamp is shown in the figure when the circuit is closed
One of the lamps has the highest brightness

Lamp C	Lamp A
All lamps have the same brightness -D	Lamp B

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\[33 \star \]

Three identical lamps connected in parallel as shown in the figure below connected to a battery What happens if the filament of lamp
B burns out

( A,C ) The brightness of lamps decreases-C	B The brightness of lamp A decreases and the brightness of lamp C increases -A
( A,C ) The brightness remains the same for both lamps -D	All lamps will turn off-B

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\[34 \star \star \]

Three identical lamps connected together as shown in the figure below
One of the lamps has the highest brightness

Lamp C	Lamp A
All lamps have the same brightness-D	Lamp B

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\[35 \star \star \star \]

Three identical lamps connected together as shown in the figure below
One of the lamps has the highest brightness

Lamp C	Lamp A
All lamps have the same brightness-D	Lamp B

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\[36 \star \]

A wire carries a current of \[4A\] then the number of electrons that pass through the wire's cross-section in \[3S\] equals

2.8 × 1020 electrons -C	8.3 × 1020 electrons -A
9.6 × 1019 electrons-D	7.5 × 1019 electrons-B

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\[37 \star \]

An amount of charge passing through a wire's cross-section changes with time according to the following equation \[q(t)=2t^2+3\]then the current intensity in the wire after half a second equals

\[i=2\;\; A\;\;\;\;\;\;-C\]	\[i=3\;\; A\;\;\;\;\;\;-A\]
\[i=4\;\; A\;\;\;\;\;\;-D\]	\[i=1\;\; A\;\;\;\;\;\;-B\]

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\[38 \star \]

Four identical resistors are connected to a battery as shown in the figure below

The graph that represents the voltage drop across each part of the circuit starting from the positive terminal of the battery, passing through the resistors, and ending back at the negative terminal of the battery

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\[39 \star \star \]

A set of resistors connected to a battery as shown in the figure below. The total power dissipated in the circuit equals

\[P=V^2\frac{(R_1+R_2+R_3)}{R_1(R_2+R_3)}\;\;\;\;\;\;-C\]	\[P=\frac{V^2}{R_1+R_2+R_3}\;\;\;\;\;\;-A\]
\[P=V^2\frac{(R_1+R_2+R_3)}{R_1(R_2+R_3)}\;\;\;\;\;\;-D\]	\[P=\frac{R_1+R_2+R_3}{V^2}\;\;\;\;\;\;-B\]

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\[40 \star \]

Two resistors have the same length, made of the same material, at the same temperature, and the area \[ R_1\] is twice the area of \[R_2\]. They are connected to the same battery until its energy is depleted. One of the following answers matches this information:

The resistor with lower resistance operates for a longer time-C	Resistor 2 operates for twice the time of resistor 1 -A
Both resistors operate for the same time -D	Resistor 1 operates for twice the time of resistor 2 -B

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\[41 \star \star \]

A lamp with power \[100W\]
operates at 40% efficiency where it converts electrical energy to radiation
The energy converted to heat during one hour equals

\[E= 2.16 ×10^5\;\; J\;\;\;\;\;\;-C\]	\[E= 1.14 ×10^5\;\; J\;\;\;\;\;\;-A\]
\[E= 6 ×10^1\;\; J\;\;\;\;\;\;-D\]	\[E= 4 ×10^1\;\; J\;\;\;\;\;\;-B\]

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\[42 \star \]

A fan operates under a potential difference \[V= 220 V\] with a current of \[I = 0.1 A\]. The energy consumed in one minute equals

\[E= 840\;\; J\;\;\;\;\;\;-C\]	\[E= 615 \;\; J\;\;\;\;\;\;-A\]
\[E= 1320\;\; J\;\;\;\;\;\;-D\]	\[E= 2318 \;\; J\;\;\;\;\;\;-B\]

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\[43 \star \]

A student studied the relationship between current intensity and voltage for an ohmic resistor then conducted the same experiment on a lamp and studied the relationship between current intensity and voltage The graphs for both experiments were plotted as shown in the figure below. At what voltage do the lamp's resistance and the ohmic resistance equal each other?

\[V=8 \;\; V\;\;\;\;\;\;-C\]	\[V=6.5 \;\; V\;\;\;\;\;\;-A\]
\[V=1.5 \;\; V\;\;\;\;\;\;-D\]	\[ V=3.5 \;\; V\;\;\;\;\;\;-B\]

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\[44 \star \]

The correct order of resistors with data in the following table from lowest to highest resistance

Resistor D	Resistor C	Resistor B	Resistor A
\[T=20^0\] Copper	\[T=80^0\] Aluminum	\[T=20^0\] Aluminum	\[T=20^0\] Copper

\[R_C>R_B>R_D>R_A\;\;\;\;\;\;-C\]	\[ R_D>R_A>R_B>R_C \;\;\;\;\;\;-A\]
\[R_A>R_C>R_D>R_B\;\;\;\;\;\;-D\]	\[R_C>R_B>R_A>R_D\;\;\;\;\;\;-B\]

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\[45 \star \star \]

Two equal resistances when connecting the switch \[S\] in the circuit below then the ammeter reading in the circuit

Increases four times -C	Decreases to half -A
Remains the same -D	Doubles -B

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\[46 \star \]

In the figure below, the current intensity in a conductor changes with time as shown in the figure, then the average amount of charge passing through the conductor during the time period
t= 0 S
to the time period
t= 5S
equals

\[ q=20\;\; 𝒄\;\;\;\;\;\;-C\]	\[ q=25\;\; 𝒄\;\;\;\;\;\;-A\]
\[ q=15.5\;\; 𝒄\;\;\;\;\;\;-D\]	\[q=12.5\;\; 𝒄\;\;\;\;\;\;-B\]

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Select the correct answer

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A

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B

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C

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D

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Solve the following problems

\[1 \star \]

In the figure below, a complex circuit from the information in the figure
Find the value of the resistor \[R_E\] \[.........................................\;\;\;\;\;\;....................................\] \[........................................\;\;\;\;\;\;....................................\] \[.........................................\;\;\;\;\;\;....................................\] \[........................................\;\;\;\;\;\;....................................\] Find the value of the battery voltage \[V_{tot}\] \[.........................................\;\;\;\;\;\;....................................\] \[........................................\;\;\;\;\;\;....................................\]

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\[2 \star \]

Three identical lamps connected to a battery with voltage \[12 \;V\] when closing the switch, the ammeter reading is \[6\;A\] calculate the resistance of each lamp \[.........................................\;\;\;\;\;....................................\] \[.........................................\;\;\;\;\;....................................\] \[.........................................\;\;\;\;\;....................................\] \[.........................................\;\;\;\;\;....................................\]
A wire was connected between the terminals of lamp \[C\] calculate the ammeter reading after connecting the wire
\[.........................................\;\;\;\;\;....................................\] \[.........................................\;\;\;\;\;....................................\] \[.........................................\;\;\;\;\;....................................\]

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\[3 \star \]

In the electrical circuit below, the current passing through the resistor was measured \[R_1=3\;Ω\Rightarrow I_1=0.8\; A\] from the information shown in the figure, calculate the source voltage

\[.........................................\;\;\;\;\;\;....................................\] \[.........................................\;\;\;\;\;\;....................................\] \[.........................................\;\;\;\;\;\;....................................\]\[.........................................\;\;\;\;\;\;....................................\]

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