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

Q. If A = 10 + j then logeA is

View solution

Q. A loudspeaker transformer has a turns ratio of 20 : 1. The speaker impedance is 20Ω. Primary impedance of transformer is

View solution

Q. A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q = 100. If each of R, L and C is doubled from its original value, the new Q of the circuit is

View solution

Q. Assertion (A): The polynomial s³ + 6s² + 12s + 8 is Hurwitz.

Reason (R): In a Hurwitz polynomial all coefficients are non-negative.

View solution

Q. A dc network has an open circuit voltage of 5 V. When its terminals are short circuited a current of 5 A flows through the short circuit. If the short circuit is removed and a resistance of 1.5 Ω is connected across its terminals, the current will be

View solution

Q. A coil of resistance R and inductance L has a capacitor C in parallel with it. The source frequency is adjusted to a value equal to resonant frequency. Another capacitor C is added in parallel with the above circuit, the source current will

View solution

Q. Discharge breakdown in insulators is due to voids.

View solution

Q. If a coil has diameter 'd' number of turns 'N' and form factor 'F' then the inductance of coil is proportional to

View solution

Q. Which of the following is correct?

View solution

Q. For 2 port reciprocal network, o.c. output voltage divided by input current is equal to

View solution