Discussion
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- Question
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
- Correct Answer
- is lowered as the load increases
- 1. 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
- 2. An example of potential energy is:
Options- A. tea-kettle steam
- B. a moving vehicle
- C. the sun
- D. a battery Discuss
- 3. How many valence shell electrons are there in semiconductor atoms?
Options- A. 16
- B. 8
- C. 4
- D. 2 Discuss
- 4. What is a characteristic of a secondary cell?
Options- A. rechargeability
- B. not rechargeable
- C. a dry cell
- D. non-liquid Discuss
- 5. 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
- 6. Current is considered as the movement of:
Options- A. electrons
- B. protons
- C. charge
- D. nuclei Discuss
- 7. 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
- 8. Primary batteries, unlike secondary batteries, may be:
Options- A. charged once
- B. used once
- C. recharged over and over
- D. stored indefinitely Discuss
- 9. 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 Discuss
- 10. 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 Discuss
Voltage and Current problems
Search Results
Correct Answer: conventional current flow came first
Correct Answer: a battery
Correct Answer: 4
Correct Answer: rechargeability
Correct Answer: circuit is open
Correct Answer: electrons
Correct Answer: a circuit breaker is reusable
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.
Secondary batteries (rechargeable batteries), which are designed to be recharged and used multiple times.
Correct Answer: the movement of electrons
Correct Answer: 2 A
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