Q. If f1 and f2 and half-power frequency and f0 be resonant frequency, the selectivity of R-L-C series circuit is given by

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Q. In a power system, reactive power is necessary for

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Q. A periodic voltage has following values for equal time intervals changing suddenly from one value to next, 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, -5, -10 etc. then rms value of the waveform is

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Q. Assertion (A): When capacitor is fed by a dc voltage given a capacitor behaves as short circuit at t = 0 and open circuit at f = ∞.

Reason (R): The impedance of a capacitor is 1/Sc

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Q. 1. P(s) = s⁴ + s³ + 2s² + 4s + 3

2. Q(s) = s⁴ + 2s³ + s

Which one of the following statements in correct for above P(s) and Q(s) polynomials?

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Q. The material used for fuse must have

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Q. The function δ (t - b) is a

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Q. In a loss-free R-L-C circuit the transient current is

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Q. The magnitude response of a normalised Butterworth low pass filter is

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Q. In steady state condition inductor behave as

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Q. Assertion (A): Charge is dual of flux.

Reason (R): Short circuit is dual of open circuit.

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Q. For ideal performance, a filter should be terminated in characteristic impedance.

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Q. For a symmetrical network

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

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Q. The function s² + 1/ s(s² + 2) is an

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Q. Paper capacitors are used in power supplies for filtering.

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Q. In any two port network, input impedance is independent of load impedance.

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Q. Dielectric materials have high specific resistance.

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Q. The resistance of a standard conductor.

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Q. In a driving point function, the degrees of numerator and denominator polynomials in s may differ by either zero or one only.

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