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

View solution

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

View solution

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

View solution

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

View solution

Q. A material for permanent magnet should have

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. Tellegen's theorem is applicable to

View solution

Q. Which of the statement is correct?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. Assertion (A): Thevenin's theorem and Norton's theorem are dual of each other.

Reason (R): Voltage source can be converted into current source and vice versa.

View solution

Q. A coil has a resistance of 2 Ω and inductance of 0.1 mH. The applied voltages is suddenly increased from 10 V to 20 V. After steady state condition have reached, the current is

View solution

Q. In a series RLC circuit the dB level of currents at half power frequencies as compared to current at resonance is

View solution