Q. Assertion (A): In a parallel circuit with three branches having R, L and C respectively and fed by a step current I, the current through inductance is always zero.

Reason (R): The time constant of R-L circuit is L/R.

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Q. When a source is delivering maximum power to a load through a network, the ratio of power delivered to the source power

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Q. A two branch parallel tuned circuit has a coil of resistance 100 Ω and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency, the dynamic resistance is

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Q. If each branch of a Delta circuit has impedance √3 Z then each branch of the equivalent Y circuit has impedance.

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Q. An RLC series circuit has R = 1 Ω, L = 1 H, C = 1 F. The damping ratio is

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Q. In a purely capacitive circuit, the current __________ the voltage by __________ .

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Q. A circuit has two branches in parallel and each branch has only one element. The applied voltage and source current are v = 200 sin (200t + 30°) and i = 50 sin (200t + 50°). If one branch has capacitor, the other branch contains

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Q. If B = 4 + j3, (B)^1/3 =

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Q. The equivalent unit of joule is

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Q. Two coils are connected in parallel. Their fluxes are adding. If the connections of one of the coils are reversed, the total inductance of the arrangement

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Q. The graph of a network has 6 branches with 3 tree branches. The minimum number of equations required for solution of network is

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Q. In a one port network Z(s) = s+2/s+3 . It is excited by a unit step current. The initial and final values of voltage across the network impedance are

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Q. The number of electrons in motion at the instant of positive peak of a symmetrical ac wave is the same as that at the instant of negative peak.

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Q. A two branch parallel tuned circuit has 100 Ω resistance and 0.1 H inductance in one branch and 10¯⁶ F capacitor in the other. At resonance frequency, the dynamic resistance is

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Q. A series R, L, C circuit has R = 2Ω, L = 1H, C = 1 μF. It is connected to an ac variable frequency source of peak voltage 10 V. At resonance the power supplied by the source will be

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Q. A series circuit has R = 5 Ω and C = 10 μF. At t = 0 it is switched on to a 10 V dc battery. The maximum current in the circuit is

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Q. A practical Parallel resonant circuit has a coil in Parallel with a 0.14 μf capacitor. The coil has an inductance of 1 mH and a resistance of 10 ohms. The Q of the circuit is

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Q. An AC circuit has two branches in parallel. The current in one branch is 5 A. Then the current source

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Q. A material for permanent magnet should have

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Q. Which of the following frequencies has the greatest period?

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