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ECE :: Network Analysis and Synthesis

  1. A dielectric does not have leakage current.

  2. A.
    True
    B.
    False

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  3. A series RLC circuit has a resonant frequency of 1000 Hz. The maximum voltage across C is likely to occur at a frequency of about

  4. A.
    1000 Hz
    B.
    2000 Hz
    C.
    1025 Hz
    D.
    975 Hz

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  5. The resistance of a 230 V, 100 W lamp is

  6. A.
    529 Ω
    B.
    2300 Ω
    C.
    5290 Ω
    D.
    23 Ω

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  7. A network has two branches in parallel. One branch contains impedance Z1 and the other branch has impedance Z2. If it is fed from an ac voltage V of frequency f, the current through Z1 depends, on

  8. A.
    V, Z1, Z2
    B.
    V, Z1
    C.
    Z1, Z2
    D.
    V, Z1, f

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  9. In the given circuit, viewed from AB, the circuit can be reduced to an equivalent circuit as

  10. A.
    5 volts source in series with 10 Ω resistor
    B.
    7 volts source in series with 2.4 Ω resistor
    C.
    15 volts source in series with 2.4 Ω resistor
    D.
    1 volt source in series with 10 Ω resistor

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  11. For the network of figure KVL for first loop is

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  13. An RC series circuit is charged by a voltage E. After a long time the battery is removed and a short circuit is placed across R-C. Then

  14. A.
    the polarity of voltage across R is same during discharge and during charge
    B.
    the polarity of voltage across R during discharging is opposite to that during charging
    C.
    the polarity of voltage across R depends on time constant RC
    D.
    none of the above

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  15. Two coils having self inductances of 10 mH and 40 mH are mutually coupled. The maximum possible mutual inductance is

  16. A.
    40 mH
    B.
    20 mH
    C.
    10 mH
    D.
    5 mH

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  17. In the circuit shown in figure the current I of sinusoidal source is

  18. A.
    25 A
    B.
    4 A
    C.
    20 A
    D.
    Not determinable from given data

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  19. In figure the voltage drop across the 10 Ω resistance is 10 V. The resistance R

  20. A.
    is 6 Ω
    B.
    is 8 Ω
    C.
    is 4 Ω
    D.
    cannot be found

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