Question 1

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 mV 
A)  15.5 V 
B)  1.42 V 
C)  51.2 V 
D)  15.5 mV

Question 2

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 same 
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 same

Question 3

-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 Ω 
A)  4.78 kΩ 
B)  121 Ω 
C)  2.69 kΩ 
D)  2.69 Ω

Question 4

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 Ω 
A)  0.3 Ω 
B)  0.03 Ω 
C)  3.0 Ω 
D)  30 Ω

Question 5

$6$ 
   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 
A)  10 µA 
B)  1 µA 
C)  1 mA 
D)  100 µA

Question 6

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 V 
A)  2.5 kV 
B)  250 V 
C)  25 V 
D)  2.5 V

Question 7

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 Ω 
A)  18 Ω 
B)  12 Ω 
C)  6.0 Ω 
D)  6.2 Ω

Question 8

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 mA 
A)  3.84 A 
B)  0.26 mA 
C)  3.84 µA 
D)  3.84 mA

Question 9

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. 
A)  Increase it to 16 volts 
B)  Decrease it to 9 volts. 
C)  Increase it to 20 volts 
D)  Decrease it to 6 volts.

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

Voltage and current are:

Accepted Answer

A)  quantities that subtract 
B)  inversely proportional 
C)  directly proportional 
D)  ideally the same value 
A)  quantities that subtract 
B)  inversely proportional 
C)  directly proportional 
D)  ideally the same value

Question 12

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 A 
A)  0.67 mA 
B)  1.5 A 
C)  1.5 mA 
D)  0.69 A

Question 13

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 mA 
A)  5.45 mA 
B)  5.74 mA 
C)  6.0 mA 
D)  5.19 mA

Question 14

-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 kΩ 
A)  125 Ω 
B)  8 MΩ 
C)  800 kΩ 
D)  125 kΩ

Question 15

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 V 
A)  14 mV 
B)  14 V 
C)  140 mV 
D)  1.4 V

Question 16

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 A 
A)  0.001 A 
B)  0.00001 A 
C)  0.01 A 
D)  0.0001 A

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 A 
A)  8.2 A 
B)  1.0 A 
C)  0.82 A 
D)  1.22 A

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 A 
A)  3.3 A 
B)  3.0 A 
C)  0.33 A 
D)  0.5 A

Question 20

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

Exam 3: Ohms Law

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

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:

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

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

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

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

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?

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

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

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

Voltage and current are:

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

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?

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

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

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

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

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

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

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

Quantities and Units

Voltage, Current, and Resistance

Energy and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Circuit Theorems and Conversions

Branch, Loop, and Node Analyses

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Inductors

Transformers

Rc Circuits

Rl Circuits

Rlc Circuits and Resonance

Passive Filters

Circuit Theorems in Ac Analysis

Time Response of Reactive Circuits

Three-Phase Systems in Power Applications

Filters

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