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Home ‣ Electronics ‣ Resistance and Power Comments
  • Question

  • Which formula shows a direct proportionality between power and voltage?


  • Options
  • A. V = IR
  • B. P = VI
  • C. P = IR
  • D. I = V/R

  • Correct Answer
  • P = VI 

    • Resistance and Power problems

    Search Results

    • 1. One advantage of a carbon film resistor over a carbon composition resistor is:

    • Options
    • A. less circuit noise
    • B. smaller size
    • C. higher wattage
    • D. poor tolerance
      • Discuss
    • 2. For P = V2/R, a decrease in resistance should produce:

    • Options
    • A. a decrease in power
    • B. an increase in ohms
    • C. an increase in power
    • D. a decrease in current
      • Discuss
    • 3. What type of resistors have a tolerance rating of 5% or greater?

    • Options
    • A. precision
    • B. SIP
    • C. general-purpose
    • D. wirewound
      • Discuss
    • 4. 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
    • 5. 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
    • 6. A potentiometer has how many leads?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 7. If a calculator display was "0.00263," what would this answer be in percent?

    • Options
    • A. 0.026%
    • B. 0.26%
    • C. 2.63%
    • D. 26.3%
      • Discuss
    • 8. A 33 kΩ resistor with a 20% tolerance checks out as ok with which of the following ohmmeter readings?

    • Options
    • A. 26400 ohms
    • B. 24183 ohms
    • C. 6600 ohms
    • D. 39970 ohms
      • Discuss
    • 9. A wire with a smaller cross-sectional area will produce:

    • Options
    • A. less heat
    • B. more conductance
    • C. less resistance
    • D. more heat
      • Discuss
    • 10. With Ohm's law, no change in resistance means that current and voltage will be:

    • Options
    • A. directly proportional
    • B. unable to produce energy
    • C. the same
    • D. inversely proportional
      • Discuss

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