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Home ‣ Electronics ‣ Voltage and Current Comments
  • Question

  • Primary batteries, unlike secondary batteries, may be:


  • Options
  • A. charged once
  • B. used once
  • C. recharged over and over
  • D. stored indefinitely

  • 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.

    Voltage and Current problems

    Search Results

    • 1. 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
    • 2. Current is considered as the movement of:

    • Options
    • A. electrons
    • B. protons
    • C. charge
    • D. nuclei
      • Discuss
    • 3. 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
    • 4. 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
    • 5. An example of potential energy is:

    • Options
    • A. tea-kettle steam
    • B. a moving vehicle
    • C. the sun
    • D. a battery
      • Discuss
    • 6. 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
    • 7. 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
    • 8. What is the name of the pressure that moves electrons in a closed circuit?

    • Options
    • A. amperes
    • B. ohms
    • C. voltage
    • D. coulombs
      • Discuss
    • 9. Current equals:

    • Options
    • A.
    • B. coulombs × time
    • C.
    • D. voltage × time
      • Discuss
    • 10. What type of switch is this?


    • Options
    • A. push button
    • B. SPST
    • C. DPDT
    • D. SPDT
      • Discuss

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