Voltage and Current problems
- 1. Which electronics material opposes the movement of free electrons?
Options- A. Conductor
- B. Insulator
- C. Semiconductor
- D. Element Discuss
Correct Answer: Insulator
- 2. Which of the following statements is true?
Options- A. Unlike charges repel and like charges attract.
- B. Like charges repel and unlike charges attract.
- C. Unlike charges attract and like charges attract.
- D. Like charges repel and unlike charges repel. Discuss
Correct Answer: Like charges repel and unlike charges attract.
- 3. If the current in a circuit equals 0 A, it is likely that the
Options- A. voltage is too high
- B. resistance is too low
- C. circuit has a short
- D. circuit is open Discuss
Correct Answer: circuit is open
- 4. What is a characteristic of a secondary cell?
Options- A. rechargeability
- B. not rechargeable
- C. a dry cell
- D. non-liquid Discuss
Correct Answer: rechargeability
- 5. How many valence shell electrons are there in semiconductor atoms?
Options- A. 16
- B. 8
- C. 4
- D. 2 Discuss
Correct Answer: 4
- 6. An example of potential energy is:
Options- A. tea-kettle steam
- B. a moving vehicle
- C. the sun
- D. a battery Discuss
Correct Answer: a battery
- 7. When considering conventional current versus electron current flow:
Options- A. electron current flow came first
- B. protons move in conventional current flow
- C. conventional current flow came first
- D. the direction of current is the same in both methods Discuss
Correct Answer: conventional current flow came first
- 8. In practical applications, battery voltage:
Options- A. is restored as soon as disconnect occurs
- B. is lowered as the load increases
- C. may be stored indefinitely
- D. will be reduced to zero as power is drawn Discuss
Correct Answer: is lowered as the load increases
- 9. Current is considered as the movement of:
Options- A. electrons
- B. protons
- C. charge
- D. nuclei Discuss
Correct Answer: electrons
- 10. 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 Discuss
Correct Answer: a circuit breaker is reusable
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