Q. In a series RLC circuit the dB level of currents at half power frequencies as compared to current at resonance is

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Q. If A = 10 + j then logeA is

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Q. A loudspeaker transformer has a turns ratio of 20 : 1. The speaker impedance is 20Ω. Primary impedance of transformer is

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Q. A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q = 100. If each of R, L and C is doubled from its original value, the new Q of the circuit is

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Q. Assertion (A): The polynomial s³ + 6s² + 12s + 8 is Hurwitz.

Reason (R): In a Hurwitz polynomial all coefficients are non-negative.

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Q. A dc network has an open circuit voltage of 5 V. When its terminals are short circuited a current of 5 A flows through the short circuit. If the short circuit is removed and a resistance of 1.5 Ω is connected across its terminals, the current will be

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Q. A coil of resistance R and inductance L has a capacitor C in parallel with it. The source frequency is adjusted to a value equal to resonant frequency. Another capacitor C is added in parallel with the above circuit, the source current will

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Q. Discharge breakdown in insulators is due to voids.

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Q. If a coil has diameter 'd' number of turns 'N' and form factor 'F' then the inductance of coil is proportional to

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Q. Which of the following is correct?

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Q. For 2 port reciprocal network, o.c. output voltage divided by input current is equal to

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Q. An RC impadence function has a pole at s = 0. The first element in the Foster form of synthesis

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Q. μ₀ = 8.85 x 10¯¹²F/m.

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Q. A series RC circuit has fixed XC, and variable R. The current locus is in the first quadrant.

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Q. One limitation of constant k filters is that Z0 is not constant in the pass band.

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Q. The response to sinusoidal excitation can be found by

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Q. The time constant of an R.C. circuit increases if the value of resistance is

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Q. For an RC impedance function

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Q. Assertion (A): In high Q circuits poles of Y(s) lie close to ω axis in complex frequency plane.

Reason (R): Q is inversely proportional to damping factor.

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Q. If the ratio p(s)/q(s) represents a transfer function then

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