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Electronics
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Voltage and Current
Comments
Question
What is the name of the pressure that moves electrons in a closed circuit?
Options
A. amperes
B. ohms
C. voltage
D. coulombs
Correct Answer
voltage
Voltage and Current problems
Search Results
1. If 40 C of charge flow past a point in 20 s, what is the current?
Options
A. 2 A
B. 0.5 A
C. 20 A
D. 40 A
Show Answer
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Discuss
Correct Answer: 2 A
2. Current is:
Options
A. the presence of a positive charge
B. the abundance of electrons
C. the movement of electrons
D. the repulsion of electrons
Show Answer
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Discuss
Correct Answer: the movement of electrons
3. Primary batteries, unlike secondary batteries, may be:
Options
A. charged once
B. used once
C. recharged over and over
D. stored indefinitely
Show Answer
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Discuss
Correct Answer: used once
Explanation:
Primary batteries (disposable batteries), which are designed to be used once and discarded when they are exhausted.
Secondary batteries (rechargeable batteries), which are designed to be recharged and used multiple times.
4. The basic difference between a fuse and a circuit breaker is
Options
A. a fuse is slower
B. a fuse is reusable
C. a circuit breaker is reusable
D. a circuit breaker is more reliable
Show Answer
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Discuss
Correct Answer: a circuit breaker is reusable
5. Current is considered as the movement of:
Options
A. electrons
B. protons
C. charge
D. nuclei
Show Answer
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Discuss
Correct Answer: electrons
6. Current equals:
Options
A.
B. coulombs × time
C.
D. voltage × time
Show Answer
Scratch Pad
Discuss
Correct Answer:
7. What type of switch is this?
Options
A. push button
B. SPST
C. DPDT
D. SPDT
Show Answer
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Discuss
Correct Answer: SPDT
8. A lead-acid battery is an example of a
Options
A. solar cell
B. fuel cell
C. primary battery
D. secondary battery
Show Answer
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Discuss
Correct Answer: secondary battery
9. A voltage will influence current only if the circuit is:
Options
A. open
B. insulated
C. high resistance
D. closed
Show Answer
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Discuss
Correct Answer: closed
10. One coulomb passing a point in one second is one:
Options
A. ampere
B. volt
C. ohm
D. charge
Show Answer
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Discuss
Correct Answer: ampere
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