Question 1

If the resistor's voltage is 3 V, with 100 mA flowing through it, what is the resistors value?

Accepted Answer

A)   0.3 Ω
B)   0.03 Ω
C)   3.0 Ω
D)   30 ΩE) B) and C)
F) A) and D)

Question 2

Figure 3-2
-Given the circuit in Figure 3-2, how much current is flowing through the circuit?

Accepted Answer

A)   3.84 A
B)   0.26 mA
C)   3.84 µA
D)   3.84 mAE) A) and B)
F) All of the above

Question 3

666  
  Figure 3-16
-Given the circuit in Figure 3-16, what is the circuit current?

Accepted Answer

A)   10 µA
B)   1 µA
C)   1 mA
D)   100 µA E) C) and D)
F) B) and D)

Question 4

You found a real bargain on a dashboard fan at a flea market. When you got home, you discovered it was a 6 volt fan that would draw 500 mA at 6 V. Your car has a 12 V system. You need a resistor that will drop 6 V at 500 mA. What value resistor do you need?

Accepted Answer

A)   18 Ω
B)   12 Ω
C)   6.0 Ω
D)   6.2 ΩE) None of the above
F) B) and D)

Question 5

How much voltage is needed to produce a current of 5 A when total opposition is 50 Ω?

Accepted Answer

A)   2.5 kV
B)   250 V
C)   25 V
D)   2.5 VE) None of the above
F) A) and D)

Question 6

A short could best be described as a unintended path for voltage.

Accepted Answer

A) True 
 B)False

Question 7

Voltage and current are:

Accepted Answer

A)   quantities that subtract
B)   inversely proportional
C)   directly proportional
D)   ideally the same valueE) C) and D)
F) A) and B)

Question 8

Figure 3-4
-Given the circuit in Figure 3-4, how much current flows through the circuit?

Accepted Answer

A)   0.67 mA
B)   1.5 A
C)   1.5 mA
D)   0.69 AE) B) and C)
F) A) and D)

Question 9

Figure 3-8
-Given the circuit in Figure 3-8, what is the voltage across the resistor?

Accepted Answer

A)   15.5 V
B)   1.42 V
C)   51.2 V
D)   15.5 mVE) A) and B)
F) A) and C)

Question 10

How much current flows when a 15 ohm resistor is connected across a 5 V source?

Accepted Answer

A)   3.3 A
B)   3.0 A
C)   0.33 A
D)   0.5 AE) A) and B)
F) B) and C)

Question 11

If V = 50 V and R = 100 kΩ the current equals .

Accepted Answer

A)   500 µA
B)   50 mA
C)   0.5 mA
D)   both A and CE) A) and D)
F) B) and C)

Question 12

Figure 3-15
-Given the circuit in Figure 3-15, what is the circuit current?

Accepted Answer

A)   0.001 A
B)   0.00001 A
C)   0.01 A
D)   0.0001 AE) A) and C)
F) All of the above

Question 13

-Given the circuit in Figure , what is the value of the resistor?

Accepted Answer

A)   125 Ω
B)   8 MΩ
C)   800 kΩ
D)   125 kΩE) None of the above
F) A) and B)

Question 14

-Given the circuit in Figure , what is the value of the resistor?

Accepted Answer

A)   4.78 kΩ
B)   121 Ω
C)   2.69 kΩ
D)   2.69 ΩE) B) and C)
F) None of the above

Question 15

If a variable voltage source is set to 12 volts. To what voltage must it be adjusted to decrease the circuit current by 25%?

Accepted Answer

A)   Increase it to 16 volts
B)   Decrease it to 9 volts.
C)   Increase it to 20 volts
D)   Decrease it to 6 volts.E) All of the above
F) A) and C)

Question 16

A change in voltage will result in a linearly proportional change in current.

Accepted Answer

A) True 
 B)False

Question 17

Given the circuit in Figure 3-1, how many amps of current flow through the circuit?

Accepted Answer

A)   8.2 A
B)   1.0 A
C)   0.82 A
D)   1.22 AE) B) and C)
F) A) and B)

Question 18

A battery applies 45 volts to a circuit, while an ammeter reads 10 mA. Later, the ammeter reading drops to 7 mA. Assuming the resistance has not changed, the voltage must have:

Accepted Answer

A)   increased to 58.5 volts
B)   decreased to 31.5 volts
C)   decreased 30% from its old value
D)   both B and C are correct
E)   stayed the sameF) C) and D)
G) B) and C)

Question 19

The current through a 10 kΩ resistor is 14 µA. What is the voltage drop across the resistor?

Accepted Answer

A)   14 mV
B)   14 V
C)   140 mV
D)   1.4 VE) C) and D)
F) None of the above

Question 20

A certain resistor has a color code of Red/Red/Red/Gold) . If this resistor were connected across the terminals of a 12 volt car battery, what nominal current would flow through the resistor?

Accepted Answer

A)   5.45 mA
B)   5.74 mA
C)   6.0 mA
D)   5.19 mAE) C) and D)
F) None of the above

Exam 3: Ohms Law

A short could best be described as a unintended path for voltage.

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A change in voltage will result in a linearly proportional change in current.

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How much current flows when a 15 ohm resistor is connected across a 5 V source?

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Figure 3-4 -Given the circuit in Figure 3-4, how much current flows through the circuit?

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Voltage and current are:

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Figure 3-15 -Given the circuit in Figure 3-15, what is the circuit current?

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If a variable voltage source is set to 12 volts. To what voltage must it be adjusted to decrease the circuit current by 25%?

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You found a real bargain on a dashboard fan at a flea market. When you got home, you discovered it was a 6 volt fan that would draw 500 mA at 6 V. Your car has a 12 V system. You need a resistor that will drop 6 V at 500 mA. What value resistor do you need?

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The current through a 10 kΩ resistor is 14 µA. What is the voltage drop across the resistor?

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Figure 3-2 -Given the circuit in Figure 3-2, how much current is flowing through the circuit?

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A certain resistor has a color code of Red/Red/Red/Gold) . If this resistor were connected across the terminals of a 12 volt car battery, what nominal current would flow through the resistor?

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-Given the circuit in Figure , what is the value of the resistor?

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-Given the circuit in Figure , what is the value of the resistor?

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Figure 3-8 -Given the circuit in Figure 3-8, what is the voltage across the resistor?

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If V = 50 V and R = 100 kΩ the current equals .

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666 Figure 3-16 -Given the circuit in Figure 3-16, what is the circuit current?

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Given the circuit in Figure 3-1, how many amps of current flow through the circuit?

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How much voltage is needed to produce a current of 5 A when total opposition is 50 Ω?

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If the resistor's voltage is 3 V, with 100 mA flowing through it, what is the resistors value?

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A battery applies 45 volts to a circuit, while an ammeter reads 10 mA. Later, the ammeter reading drops to 7 mA. Assuming the resistance has not changed, the voltage must have:

Correct AnswerverifiedShow Answer

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$6$ Figure 3-16 -Given the circuit in Figure 3-16, what is the circuit current?

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