Voltage and Current problems
- 1. Primary batteries, unlike secondary batteries, may be:
Options- A. charged once
- B. used once
- C. recharged over and over
- D. stored indefinitely 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.
Secondary batteries (rechargeable batteries), which are designed to be recharged and used multiple times.
- 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 Discuss
Correct Answer: the movement of electrons
- 3. 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
Correct Answer: 2 A
- 4. What is the name of the pressure that moves electrons in a closed circuit?
Options- A. amperes
- B. ohms
- C. voltage
- D. coulombs Discuss
Correct Answer: voltage
- 5. Current equals:
Options- A.
- B. coulombs × time
- C.
- D. voltage × time Discuss
Correct Answer:
- 6. What type of switch is this?
Options- A. push button
- B. SPST
- C. DPDT
- D. SPDT Discuss
Correct Answer: SPDT
- 7. A lead-acid battery is an example of a
Options- A. solar cell
- B. fuel cell
- C. primary battery
- D. secondary battery Discuss
Correct Answer: secondary battery
- 8. A voltage will influence current only if the circuit is:
Options- A. open
- B. insulated
- C. high resistance
- D. closed Discuss
Correct Answer: closed
- 9. One coulomb passing a point in one second is one:
Options- A. ampere
- B. volt
- C. ohm
- D. charge Discuss
Correct Answer: ampere
- 10. If an electrical system is compared to a fluid system, the electrical current corresponds to the:
Options- A. pressure
- B. pump
- C. water wheel
- D. water flow Discuss
Correct Answer: water flow
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