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A.C Fundamentals, Circuits and Circuit Theory - section-1
  1. Which of the following refers to a parallel circuit?

    2. A.

     The current through each element is same
    B.

     The voltage across element is in proportion to it's resistance value
    C.

     The equivalent resistance is greater than any one of the resistors
    D.

     The current through any one element is less than the source current

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  2. In any A.C. circuit always

    3. A.

     Apparent power is more than actual power
    B.

     Reactive power is more than apparent power
    C.

     Actual power is more than reactive power
    D.

     Reactive power is more than actual power

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  3. The transient currents are associated with the

    4. A.

     Changes in the stored energy in the inductors and capacitors
    B.

     Impedance of the circuit
    C.

     Applied voltage to the circuit
    D.

     Resistance of the circuit

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  4. The inductance of a coil can be increased by

    5. A.

     Increasing core length
    B.

     Decreasing the number of turns
    C.

     Decreasing the diameter of the former
    D.

     Choosing core material having high relative permeability

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  5. Power factor of an electrical circuit is equal to

    6. A.

     R/Z
    B.

     Cosine of phase angle difference between current and voltage
    C.

     Ratio of useful current to total current Iw/I
    D.

     All above

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  6. The time constant of a series R-C circuit is given by

    7. A.

     R/C
    B.

     RC2
    C.

     RC
    D.

     R2C

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  7. The power is measured in terms of decibels in case of

    8. A.

     Electronic equipment
    B.

     Transformers
    C.

     Current transformers
    D.

     Auto transformers

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  8. Inductance affects the direct current flow

    9. A.

     Only at the time of turning off
    B.

     Only at the time of turning on
    C.

     At the time of turning on and off
    D.

     At all the time of operation

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  9. The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces

    10. A.

     The more heat than produced by A.C. when flowing through the same circuit
    B.

     The same heat as produced by A.C. when flowing through the same circuit
    C.

     The less heat than produced by A.C. flowing through the same circuit
    D.

     None of the above

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  10. The ratio of active power to apparent power is known as factor.

    11. A.

     Demand
    B.

     Load
    C.

     Power
    D.

     Form

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