Question 1

-If V=12V and a 12kΩ resistor were to open in Figure 3 -1, the current is _ _.

Accepted Answer

A) 10 mA 
B) 0 A 
C) 1 mA 
D) extremely high 
A) 10 mA 
B) 0 A 
C) 1 mA 
D) extremely high B

Question 2

-If V = 50 V and I = 37 mA in Figure 3 -1, is dissipated by the resistor.

Accepted Answer

A) 1.85 W 
B) 135 m W 
C) 1.35 W 
D) 0.185 m W 
A) 1.85 W 
B) 135 m W 
C) 1.35 W 
D) 0.185 m W A

Question 3

-If V = 72 V and I = 12 mA in Figure 3 -1, the resistance equals .

Accepted Answer

A) 47 kΩ 
B) 6 kΩ 
C) 864 Ω 
D) 0.166 Ω 
A) 47 kΩ 
B) 6 kΩ 
C) 864 Ω 
D) 0.166 Ω B

Question 4

If a 56 kΩ resistor carries 10 mA, it is safe to use a 10 W resistor.

Accepted Answer

A) True 
 B)False

Question 5

Which is the most unlikely resistor failure?

Accepted Answer

A) resistance change 
B) shorting 
C) opening 
D) All are common failures. 
A) resistance change 
B) shorting 
C) opening 
D) All are common failures.

Question 6

If a resistor that is color coded yellow -violet -red is placed across a 25 V source voltage, what value resistor and wattage rating could be used?

Accepted Answer

A) 4700 Ω, 1/4 W 
B) 470 Ω, 1/2 W 
C) 47000 Ω, 1/4 W 
D) 4700 Ω, 1/8 W 
A) 4700 Ω, 1/4 W 
B) 470 Ω, 1/2 W 
C) 47000 Ω, 1/4 W 
D) 4700 Ω, 1/8 W

Question 7

-If the voltage is suddenly switched off in Figure 3 -1, .

Accepted Answer

A) the current will gradually decrease to 0 A 
B) the current will suddenly drop to 0 A 
C) the current will first increase and then decrease to 0 A 
D) there is no way to predict the current 
A) the current will gradually decrease to 0 A 
B) the current will suddenly drop to 0 A 
C) the current will first increase and then decrease to 0 A 
D) there is no way to predict the current

Question 8

In the operation of electrical circuits, which, in most cases, is an unwanted by -product?

Accepted Answer

A) heat 
B) mechanical motion 
C) light 
D) both B and C 
A) heat 
B) mechanical motion 
C) light 
D) both B and C

Question 9

If a 47 kΩ resistor carries 5 mA, it's safe to use a 1 W resistor.

Accepted Answer

A) True 
 B)False

Question 10

Which is the correct formula for Ohm's Law?

Accepted Answer

A) R = V × I 
B) I = V ÷ R 
C) P = V × I 
D) V = I ÷ R 
A) R = V × I 
B) I = V ÷ R 
C) P = V × I 
D) V = I ÷ R

Question 11

What is the resistance of a 100 W bulb when it is operating in a circuit with a supply of 120 V?

Accepted Answer

A) 2.14 Ω 
B) 56 Ω 
C) 144 Ω 
D) 560 Ω 
A) 2.14 Ω 
B) 56 Ω 
C) 144 Ω 
D) 560 Ω

Question 12

If a resistor that is color -coded red -red -brown -silver is connected to a 15 V source, what is the maximum current that can flow?

Accepted Answer

A) 68.2 mA 
B) 71.9 mA 
C) 75.8 mA 
D) 62 mA 
A) 68.2 mA 
B) 71.9 mA 
C) 75.8 mA 
D) 62 mA

Question 13

-If a 10 kΩ resistor dissipates 0.5 W in Figure 3 -1, then the supply voltage equals _ .

Accepted Answer

A) 70.7 V 
B) 5000 V 
C) 50 V 
D) 7.07 mV 
A) 70.7 V 
B) 5000 V 
C) 50 V 
D) 7.07 mV

Question 14

-If V = 50 V and R = 25 kΩ in Figure 3 -1, the current equals _.

Accepted Answer

A) 50 mA 
B) 0.5 mA 
C) 2 mA 
D) 5 mA 
A) 50 mA 
B) 0.5 mA 
C) 2 mA 
D) 5 mA

Question 15

-If I = 64 mA and R = 47 Ω in Figure 3 -1, the voltage equals .

Accepted Answer

A) 73.4 V 
B) 7.34 V 
C) 30.1 V 
D) 3.01 V 
A) 73.4 V 
B) 7.34 V 
C) 30.1 V 
D) 3.01 V

Question 16

-If the voltage were suddenly switched on in Figure 3 -1, .

Accepted Answer

A) the current would gradually decrease and then increase 
B) the current would flow 
C) the current would gradually decrease 
D) the current would be zero 
A) the current would gradually decrease and then increase 
B) the current would flow 
C) the current would gradually decrease 
D) the current would be zero

Question 17

-If I = 27 mA and R = 4.7 Ω in Figure 3 -1, the voltage equals .

Accepted Answer

A) 5.74 V 
B) 127 mV 
C) 174 mV 
D) 7.8 V 
A) 5.74 V 
B) 127 mV 
C) 174 mV 
D) 7.8 V

Question 18

-If voltage is 12 V and the resistance is color -coded brown -black -orange in Figure 3 -1, what are the minimum and maximum possible currents?

Accepted Answer

A) IMINIMUM = 1 mA, IMAXIMUM = 1.6 mA 
B) IMINIMUM = 1.2 mA, IMAXIMUM = 1.4 mA 
C) IMINIMUM = 1 mA, IMAXIMUM = 1.5 mA 
D) IMINIMUM = 0.8 mA, IMAXIMUM = 1.2 mA 
A) IMINIMUM = 1 mA, IMAXIMUM = 1.6 mA 
B) IMINIMUM = 1.2 mA, IMAXIMUM = 1.4 mA 
C) IMINIMUM = 1 mA, IMAXIMUM = 1.5 mA 
D) IMINIMUM = 0.8 mA, IMAXIMUM = 1.2 mA

Question 19

-If V = 12 V and a 12 kΩ resistor shorts in Figure 3 -1, the current is _ _.

Accepted Answer

A) 0 A 
B) 1 mA 
C) 10 mA 
D) extremely high 
A) 0 A 
B) 1 mA 
C) 10 mA 
D) extremely high

Question 20

If a circuit's resistance decreases, its current also decreases.

Accepted Answer

A) True 
 B)False

-If V=12V and a 12kΩ resistor were to open in Figure 3 -1, the current is _ _.

-If V = 50 V and I = 37 mA in Figure 3 -1, is dissipated by the resistor.

-If V = 72 V and I = 12 mA in Figure 3 -1, the resistance equals .

If a 56 kΩ resistor carries 10 mA, it is safe to use a 10 W resistor.

Which is the most unlikely resistor failure?

If a resistor that is color coded yellow -violet -red is placed across a 25 V source voltage, what value resistor and wattage rating could be used?

-If the voltage is suddenly switched off in Figure 3 -1, .

In the operation of electrical circuits, which, in most cases, is an unwanted by -product?

If a 47 kΩ resistor carries 5 mA, it's safe to use a 1 W resistor.

Which is the correct formula for Ohm's Law?

What is the resistance of a 100 W bulb when it is operating in a circuit with a supply of 120 V?

If a resistor that is color -coded red -red -brown -silver is connected to a 15 V source, what is the maximum current that can flow?

-If a 10 kΩ resistor dissipates 0.5 W in Figure 3 -1, then the supply voltage equals _ .

-If V = 50 V and R = 25 kΩ in Figure 3 -1, the current equals _.

-If I = 64 mA and R = 47 Ω in Figure 3 -1, the voltage equals .

-If the voltage were suddenly switched on in Figure 3 -1, .

-If I = 27 mA and R = 4.7 Ω in Figure 3 -1, the voltage equals .

-If voltage is 12 V and the resistance is color -coded brown -black -orange in Figure 3 -1, what are the minimum and maximum possible currents?

-If V = 12 V and a 12 kΩ resistor shorts in Figure 3 -1, the current is _ _.

If a circuit's resistance decreases, its current also decreases.

Systems, Quantities, and Units

Voltage, Current, and Resistance

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rccircuits

Inductors

Rlcircuits

Rlccircuits and Resonance

Transformers

Time Response of Reactive Circuits

Filters

Exam 3: Ohms Law, Energy, and Power

-If V=12V and a 12kΩ resistor were to open in Figure 3 -1, the current is _ _.

-If V = 50 V and I = 37 mA in Figure 3 -1, is dissipated by the resistor.

-If V = 72 V and I = 12 mA in Figure 3 -1, the resistance equals .

If a 56 kΩ resistor carries 10 mA, it is safe to use a 10 W resistor.

Which is the most unlikely resistor failure?

If a resistor that is color coded yellow -violet -red is placed across a 25 V source voltage, what value resistor and wattage rating could be used?

-If the voltage is suddenly switched off in Figure 3 -1, .

In the operation of electrical circuits, which, in most cases, is an unwanted by -product?

If a 47 kΩ resistor carries 5 mA, it's safe to use a 1 W resistor.

Which is the correct formula for Ohm's Law?

What is the resistance of a 100 W bulb when it is operating in a circuit with a supply of 120 V?

If a resistor that is color -coded red -red -brown -silver is connected to a 15 V source, what is the maximum current that can flow?

-If a 10 kΩ resistor dissipates 0.5 W in Figure 3 -1, then the supply voltage equals _ .

-If V = 50 V and R = 25 kΩ in Figure 3 -1, the current equals _.

-If I = 64 mA and R = 47 Ω in Figure 3 -1, the voltage equals .

-If the voltage were suddenly switched on in Figure 3 -1, .

-If I = 27 mA and R = 4.7 Ω in Figure 3 -1, the voltage equals .

-If voltage is 12 V and the resistance is color -coded brown -black -orange in Figure 3 -1, what are the minimum and maximum possible currents?

-If V = 12 V and a 12 kΩ resistor shorts in Figure 3 -1, the current is _ _.

If a circuit's resistance decreases, its current also decreases.

Systems, Quantities, and Units

Voltage, Current, and Resistance

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rccircuits

Inductors

Rlcircuits

Rlccircuits and Resonance

Transformers

Time Response of Reactive Circuits

Filters