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Ohm's Law problems
1.
What is the power in the given circuit?
Options
A. 32 W
B. 80 W
C. 500 W
D. 16 kW
Show Answer
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Discuss
Correct Answer: 32 W
2. If the resistance in a circuit with constant voltage increases, the current will
Options
A. increase
B. decrease
C. stay the same
D. Not enough information
Show Answer
Scratch Pad
Discuss
Correct Answer: decrease
3.
What is the resistor value in the given circuit?
Options
A. 200 Ω
B. 1 kΩ
C. 2 kΩ
D. 4 kΩ
Show Answer
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Discuss
Correct Answer: 2 kΩ
4. What electromotive force would cause 20 A of current to flow through a 500 Ω resistor?
Options
A. 0.04 V
B. 2.5 V
C. 25.0 V
D. 10,000 V
Show Answer
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Discuss
Correct Answer: 10,000 V
5. What is the kilowatt-hour consumption of a 40 W lamp if it remains on for 1750 h?
Options
A. 43.75
B. 70
C. 43,750
D. 70,000
Show Answer
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Discuss
Correct Answer: 70
Explanation:
(1,750 x 40)/1000 = 70 kilowatt-hour.
6. "Half-splitting" is
Options
A. a means for nuclear fuel cells to produce electricity
B. a means of isolating a problem in a circuit
C. a means for reducing a high ac voltage to a low dc voltage
D. a means of limiting current in a circuit
Show Answer
Scratch Pad
Discuss
Correct Answer: a means of isolating a problem in a circuit
7. Energy is defined as the ability to
Options
A. produce heat
B. produce light
C. produce sound
D. All of the above
Show Answer
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Discuss
Correct Answer: All of the above
8. A battery's capacity to deliver power is measured in
Options
A. kWh
B. Ah
C. Wh
D. Vh
Show Answer
Scratch Pad
Discuss
Correct Answer: Ah
9. If the voltage across a fixed value of resistance is increased five times, what does the current do?
Options
A. It increases by a factor of five.
B. It decreases by a factor of five.
C. It stays the same.
D. Not enough information
Show Answer
Scratch Pad
Discuss
Correct Answer: It increases by a factor of five.
10. If current through a resistance is halved
Options
A. the resistance is halved
B. the voltage is halved
C. the voltage doubles
D. none of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: the voltage is halved
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More in Electronics:
Alternating Current and Voltage
Alternating Current vs Direct Current
Analog and Digital Converters
Analog to Digital
Arithmetic Operations and Circuits
Basic Op-Amp Circuits
Bipolar Junction Transistors (BJT)
Capacitors
Combinational Logic Circuits
Computer Hardware and Software
Diodes and Applications
Field Effect Transistors (FET)
Flip-Flops and Timers
Inductors
Logic Circuit Simplification
Logic Gates
Magnetism and Electromagnetism
Measurement, Conversion and Control
Number Systems and Codes
Ohm's Law
Operational Amplifiers
Parallel Circuits
Programmable Logic Devices (PLD)
Quantities and Units
RC Circuits
Resistance and Power
RL Circuits
RLC Circuits and Resonance
Semiconductor Memory
Semiconductor Principles
Sequential Logic Circuits
Series-Parallel Circuits
Series Circuits
Special-Purpose Op-Amp Circuits
Standard Logic Devices (SLD)
Testing and Troubleshooting
Thyristors and Tranducers
Time Response of Reactive Circuits
Transformers
Transistors and Applications
Voltage and Current
