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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Q. A variable resistance R and capacitive reactance XC are fed by an voltage. The current locus is

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Q. Two wires A and B have the same cross-section area and are made of the same material. RA = 600 Ω and RB = 100 Ω. The number of times A is longer than B is

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Q. A dc machine has 6 poles all connected in series. Each pole has 9 H inductance and field current is 2 A. Total inductance and total energy stored are

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Q. In the Bode plot, of H(s) = 1 + s/20, the phase at w = 15 is

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Q. The inductance of an air cored coil is 2 H. The number of turns is made 3 times, all other quantities remaining the same. The new value of inductance will be 2 2

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Q. Tellegen's theorem is applicable to

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Q. Which of the statement is correct?

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Q. Which synthesis procedure requires the use of mutual inductance?

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Q. A series RL circuit is excited by a voltage v(t) = Vm sin (ωt + Φ). The transient current will be zero if

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Q. The electrolyte in a dry cell is completely dry.

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Q. A series RLC circuit has a resonant frequency of 2000 Hz. The maximum voltage across C is likely to occur at a frequency of about

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