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  • Question

  • How many connections does a potentiometer have?


  • Options
  • A. 1
  • B. 2
  • C. 3
  • D. 4

  • Correct Answer
  • 3 

    Explanation
    A potentiometer uses three connections, as opposed to a rheostat, which only employs two. Having three connections allows the potentiometer to vary voltage. Both the potentiometer and the rheostat are classified as variable resistors.

    • Resistance and Power problems

    Search Results

    • 1. How many basic types of resistors exist?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 2. The six basic forms of energy are:

    • Options
    • A. light, sun, magnetic, chemical, electrical, and mechanical
    • B. electrical, mechanical, light, heat, magnetic, and chemical
    • C. electrical, mechanical, sun, heat, chemical, and light
    • D. potential, sun, light, chemical, electrical, and mechanical
      • Discuss
    • 3. With Ohm's law, if voltage increases and resistance stays the same:

    • Options
    • A. current remains the same
    • B. power decreases
    • C. current increases
    • D. resistance decreases
      • Discuss
    • 4. How many ohms of resistance allows a current of 720 µA to flow when 3.6 kV is applied?

    • Options
    • A. 200 nΩ
    • B. 5 kΩ
    • C. 200 kΩ
    • D. 5 MΩ
      • Discuss
    • 5. Wirewound resistors are usually used in circuits that have:

    • Options
    • A. high current
    • B. negative temperature coefficients
    • C. low power
    • D. high voltage
      • Discuss
    • 6. Components designed to oppose the flow of current are called:

    • Options
    • A. insulators
    • B. conductors
    • C. resistors
    • D. heat exchangers
      • Discuss
    • 7. With 1 mA of current, what wattage rating should a 470 ohm resistor have?

    • Options
    • A. 1/4 watt
    • B. 1/2 watt
    • C. 1 watt
    • D. 2 watts
      • Discuss
    • 8. If a variable resistor's resistance varies in a nonuniform manner as the shaft is moved, it is considered to be:

    • Options
    • A. linear
    • B. defective
    • C. not wirewound
    • D. tapered
      • Discuss
    • 9. Resistor tolerance is either printed on the component, or is provided by:

    • Options
    • A. keyed containers
    • B. size
    • C. color code
    • D. ohmmeter reading
      • Discuss
    • 10. A conductor's cross-sectional area in circular mils for inch is:

    • Options
    • A. 500 cmils
    • B. 100,000 cmils
    • C. 1,000,000 cmils
    • D. 500,000,000 cmils
      • Discuss

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