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UPPCL AE :Circuit Theory Quiz 6

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Question 1

If a series RLC circuit resonates at 1.5 kHz and consumes 100 watts from a 100 volts AC source operating at resonant frequency with a bandwidth of 0.75 kHz; the values of R, L and Q-factor of the circuit are respectively

Question 2

Suppose a circuit with impedance with magnitude 10 and an angle of 60° is supplied by voltage of v(t) = 20 sin (ωt + θ). The circuit is switched at t = 0. Find the value of θ in radians for eliminating AC transients from the circuit.

Question 3

When a 240 V, 50 Hz supply is applied to a combination of a resistor 15 Ω in parallel with an inductor having the total current of 22.1 A. What value must the frequency have for the total current to be 34.0 A.

Question 4

Consider the circuit shown below:

The value of capacitance C required to make circuit power factor unity is:

Question 5

The input power factor for circuit having voltage 100∠0° and Y_eq = 0.0224∠27.01°

Question 6

Calculate i(t) for t > 0, in the circuit shown in figure below

Question 7

A coil having resistance of 10 ohm and inductance of 1 H is switched on to a direct voltage of 100 V. Calculate the rate of change of the current at t= time constant.