Q. Two current sources each of rms value 10 A have frequencies 40 Hz and 50 Hz respectively. They are connected in series, the expression for resultant wave is

View solution

Q. To find the current in a 20 Ω resistance connected in a circuit, Norton's theorem is used. IN = 7.5 A. The current though 20 Ω resistance.

View solution

Q. While calculating Norton's resistance, all current sources are short circuited.

View solution

Q. If P = 250 W and p.f. = 0.707 lagging, Q =

View solution

Q. Assertion (A): Energy stored in inductance is LI²/2 and that in capacitance is CV²/2.

Reason (R): Inductance and capacitance are dual of each other.

View solution

Q. A series RLC circuit is at resonance at 200 Hz. If capacitance is increased to four times, the circuit will be in resonance at

View solution

Q. A system function H(s) = s / (s²+4s+100) the resonant frequency in rad/sec and bandwidth in rad/sec. is given by

View solution

Q. The temperature coefficient of copper is 0.00393 at 20° C. At 50° C the temperature coefficient is

View solution

Q. To determine the polarity of voltage drop across a resistor, it is sufficient to know

View solution

Q. A sawtooth current wave is passed through a resistance

View solution

Q. Which of the following is the poorest conductor of electricity?

View solution

Q. The value of the inductance of coil in which a current increases linearly from zero to 0.1A in 0.2 second producing a voltage of 5 volts is __________ .

View solution

Q. An RLC series circuit is excited by an ac voltage v = 1 sint. If L = 10 H, C = 0.1 F peak value of voltage across R is

View solution

Q. If all other parameters are the same, a capacitor with mica as dielectric has higher capacitance than air capacitor.

View solution

Q. If V = 100 ∠ 16°, the √(V) is

View solution

Q. In an underdamped RLC series circuit, the natural frequency is ωn. The frequency of damped oscillations is

View solution

Q. A dc network has 3 independent nodes and 4 loops. In total analysis, the number of equations is

View solution

Q. A series circuit has R = 5 Ω and C = 10 μF. It is switched on to a 12 V dc battery at t = 0. The current in the circuit will be maximum

View solution

Q. The pole of a reactive function

View solution

Q. Wave A starts its positive half cycle at ωt = 30° and wave B starts its positive half cycle at ωt = 75° then wave B is leading wave A by 45°.

View solution