Q. A coil is connected across a 200 V, 50 Hz supply and takes a current of 10 A. The loss in the coil is 1000 W. The impedance and resistance of the coil are

View solution

Q. In liquids charge carriers are electrons only.

View solution

Q. The flux linkage ψ, self inductance L and current i are related as

View solution

Q. Assertion (A): A band elimination filter attenuates signals whose frequencies lie between the cutoff frequencies.

Reason (R): A band elimination circuit is very different from band pass circuit.

View solution

Q. In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will

View solution

Q. Two coupled coils lie in parallel planes such that 50% of magnetic flux produced by one links the other. The coefficient of coupling is

View solution

Q. The unit of permeability is

View solution

Q. The ratio of active power to apparent power is known as __________ factor.

View solution

Q. Two RLC series circuit has same damping ratio. Circuit 1 has higher natural frequency as compared to circuit 2. Then

View solution

Q. A series RLC circuit is supplied from a variable frequency ac source. The resonant frequency is ω₀. The voltage across C is maximum at a frequency

View solution

Q. The maximum phase difference between the applied voltage and current in a RLC series current with finite values of R, L, C, and f can be

View solution

Q. A phasor is

View solution

Q. The phase difference (jω - p₁ )

View solution

Q. Which of the following statements is incorrect?

View solution

Q. If the peak value of output of a half wave rectifier is 100 V, the rms value is

View solution

Q. For a flexible cable, most suitable insulation is

View solution

Q. When analysing two port networks in cascade, it is more convenient to use

View solution

Q. For a transfer function H(s) = P(s)/Q(s), where P(s) and Q(s) are polynomials in s

View solution

Q. The inductance of a coil can be increased by

View solution

Q. The dual of quantity charge is

View solution