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Resistance and Power problems

  • 1. One ampere of current flowing through one ohm of resistance is equal to:

  • Options
  • A. 1 horsepower
  • B. 1 Btu
  • C. 1 watt
  • D. 1 joule
    • Discuss
  • 2. What is the power dissipated by a 1.2 kΩ resistor with 12 volts across it?

  • Options
  • A. 12 W
  • B. 1.2 W
  • C. .12 W
  • D. 12 mW
    • Discuss
  • 3. What happens to current and resistance if the voltage doubles?

  • Options
  • A. Current doubles and resistance doubles.
  • B. Current doubles and resistance is halved.
  • C. Current remains the same and resistance doubles.
  • D. Current doubles and resistance remains the same.
    • Discuss
  • 4. Power is defined as:

  • Options
  • A. the rate at which energy is used
  • B. watts
  • C. energy
  • D. the rate at which energy is generated
    • Discuss
  • 5. A 22-gauge wire will have a diameter in mils of:

  • Options
  • A. 10.03
  • B. 22.35
  • C. 45.26
  • D. 71.96
    • Discuss
  • 6. The word work means that:

  • Options
  • A. energy has been transferred
  • B. it is inversely related to energy
  • C. no energy has been transferred
  • D. work and energy are not related
    • Discuss
  • 7. What property does an incandescent lamp possess?

  • Options
  • A. cold resistance
  • B. hot resistance
  • C. ballast resistance
  • D. both cold and hot resistance
    • Discuss
  • 8. Ohm's law is not:

  • Options
  • A. V = IR
  • B. I = V/R
  • C. R = IV
  • D. R = V/I
    • Discuss
  • 9. Good insulators:

  • Options
  • A. have few electrons in their outer shells
  • B. have a large dielectric strength
  • C. have a small breakdown voltage
  • D. have many electrons in the nucleus
    • Discuss
  • 10. After a lamp is turned on, its filament resistance will change to become:

  • Options
  • A. less resistive
  • B. cooler
  • C. brighter
  • D. more resistive
    • Discuss

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