Q. A series RL circuit is excited by a voltage v(t) = Ve^(-at) such that a = R/L. Then the circuit current is

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Q. In the transformer shown in the figure, the inductance measured across the terminal 1 and 2 was 4 H with open terminals 3 and 4. It was 3H when the terminals 3 and 4 were short circuited. The coefficient of coupling would be

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Q. The condition on R, L and C such that the step response y(t) in the figure has no oscillation, is

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Q. In the transformer shown in figure, the inductance measured across terminal 1 and 2 was 4 H with terminals 3 and 4 open. It was 3H when terminals 3 and 4 are short circuited. The coefficient of coupling is

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Q. The time constant of the network shown in figure is, when switch is closed.

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Q. In figure the phase plot

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Q. The graph of a network is shown in the figure. Which one of the figure shown is not a tree of the graph?

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Q. The resistance of the aluminium conductor (r = 2.83 x 10¯⁸ Ωm) in figure is

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Q. The following table gives some Laplace transforms and the functions.

f(t) F(s)
1. δ(t) s
2. u(t) 1/s
3. tu(t) 2/s²
4. t²u(t) 2s³

Of these the correctly matched pairs are

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Q. The Laplace transform of a function f(t) u(t) is __________ where f(t) is periodic with period T, and y(S) times the L.T. of f(t) for first period. Then

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Q. What are the ABCD parameters of the single elements circuit given below?

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Q. If Ia, Ib, Ic are line currents and Ia0 is the zero sequences component of Ia then

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Q. If a resistance R of 1 Ω is connected between A and B in figure, current flowing through R is

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Q. The circuit shown in figure is a

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Q. The current I flowing in the branch is

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Q. In figure, the ratio V(s)/I(s) is

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Q. If figure, I = 2A if R = 20 Ω. When R = 10 Ω current I is

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Q. Pick the correct statement with respect to following figure.

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Q. A series RL circuit is switched on to an impulse. A δ(t) at t = 0. Then

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Q. In figure, the switch is initially open. At t = 0 switch is closed. vc (0+) and iL (0+) are

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