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ECE :: Network Analysis and Synthesis

  1. In figure, the value of R should be

  2. A.
    12 Ω
    B.
    6 Ω
    C.
    3 Ω
    D.
    1.5 Ω

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  3. An RLC series circuit has R = 7.07 Ω, L = .707 H and C = 7.07 μF. At Half power frequencies the circuit impedance is likely to be

  4. A.
    7.07 Ω
    B.
    10 Ω
    C.
    14.14 Ω
    D.
    20 Ω

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  5. In a series R, L, C circuit the impedance triangle is the same when XL < XC and XL > XC .

  6. A.
    True
    B.
    False

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  7. The zinc can of a dry cell serves as positive terminal.

  8. A.
    True
    B.
    False

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  9. Two similar coils have self inductance of 1 mH each. Coefficient of coupling is 0.5. The mutual inductance M is

  10. A.
    0.25 mH
    B.
    0.5 mH
    C.
    0.707 mH
    D.
    1 mH

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  11. A resistance coil has self inductance L, resistance R and capacitance C. The impedance across the coil is

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  13. When a lead acid cell is in fully charged condition the positive and negative plates are similar.

  14. A.
    True
    B.
    False

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  15. Two capacitors of 1 μF and 2 μF capacitance are connected in parallel across a 30 V dc battery. After the capacitors have been charged, the charges across the two capacitors will be

  16. A.
    30 μC each
    B.
    60 μC each
    C.
    30 μC and 60 μC respectively
    D.
    60 μC and 30 μC respectively

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  17. In figure, the battery has remained switched on for a long time. At t = 0 the switch is closed. The current i(t) is likely to be

  18. A.
    6
    B.
    6 - 3e-1
    C.
    6 + 3e-1
    D.
    3 - 6e-1

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  19. A thermistor is used for

  20. A.
    over voltage protection
    B.
    temperature alarm circuit
    C.
    automatic light control
    D.
    none of the above

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