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ECE :: Network Analysis and Synthesis

  1. Three resistance of 15 Ω each are connected in delta. The resistance of equivalent star will have a value of

  2. A.
    15 Ω
    B.
    5 Ω
    C.
    5/3 Ω
    D.
    45 Ω

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  3. The circuit in figure(1) is replaced by that in figure(2). It remains same R0 will be

  4. A.
    zero
    B.
    R
    C.
    2R
    D.
    4R

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  5. In a varistor the v-i graph is linear.

  6. A.
    True
    B.
    False

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  7. In the circuit of figure the current through 5 Ω resistance at t = 0+ is

  8. A.
    4 A
    B.
    2.5 A
    C.
    3.1 A
    D.
    0 A

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  9. A parallel plate capacitor with air as dielectric has a capacitance C. If the dielectric has a dielectric constant ∈r and the remaining dimensions are the same, the capacitance will be

  10. A.
    C/∈r
    B.
    rC
    C.
    2rC
    D.
    3rC

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  11. Assertion (A): When excited by a unit step voltage, an inductor behaves as open circuit at t = 0.

    Reason (R): Inductance has the property of inertia.

  12. A.
    Both A and R are true and R is correct explanation of A
    B.
    Both A and R are true and R is not the correct explanation of A
    C.
    A is true but R is false
    D.
    A is false but R is true

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  13. A bulb rated at 60 W, 120 V is used for 30 minutes. The charge associated with this operation is

  14. A.
    3600 C
    B.
    900 C
    C.
    7200 C
    D.
    600 C

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  15. In a series RLC circuit, p-f is leading if XC < XL.

  16. A.
    True
    B.
    False

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