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Home ‣ Electrical Engineering ‣ Magnetism and Electromagnetism See What Others Are Saying!
  • Question

  • Hysteresis is the number of lines of force per unit area in a magnetic field.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • More questions

    • 1. Energy is stored by an inductor in an electrostatic field.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A 33 Ω half-watt resistor and a 330 Ω half-watt resistor are connected across a 12 V source. Which one(s) will overheat?

    • Options
    • A. 33 Ω
    • B. 330 Ω
    • C. both resistors
    • D. neither resistor
      • Discuss
    • 3. In a lag network, the output voltage lags the input voltage in phase.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. In an RC differentiator, the sum of the capacitor voltage and the resistor voltage at any instant

    • Options
    • A. must be zero
    • B. must be equal to the applied voltage
    • C. is less than the applied voltage but greater than zero
    • D. cannot be determined
      • Discuss
    • 5. The number of current paths equals the number of resistors in parallel.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. There are five resistors in a given series circuit and each resistor has 6 V dropped across it. The source voltage

    • Options
    • A. is 6 V
    • B. depends on the current flow
    • C. depends on the resistor values
    • D. is 30 V
      • Discuss
    • 7. If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?

    • Options
    • A. 8 V
    • B. 320 V
    • C. 3.2 V
    • D. 32 V
      • Discuss
    • 8. In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. The total resistance for two resistors in parallel is equal to the sum of the two resistors.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The induced voltage across a stationary conductor in a stationary magnetic field is

    • Options
    • A. zero
    • B. reversed in polarity
    • C. increased
    • D. decreased
      • Discuss

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