Q. A band elimination constant k filter has series resonant circuit in series arms.

View solution

Q. If e = 110 sin (ωt + π/3) and i = 5 sin (ωt - π/3), the impedance of the circuit is

View solution

Q. Two sinusoidal waves 1 and 2 have peak values Vm1 and Vm². Wave 1 is leading wave 2 by ∠θ. Which of the following is correct?

View solution

Q. Ohm's law is valid for

View solution

Q. In an R-L circuit excited by a battery of voltage E, the current and voltage across resistor are 1- e^-t and 2(1 - e^-t) respectively. If there were an initial current of 2 A in the inductance, the voltage across resistance would have been

View solution

Q. Stray capacitance is important at low frequencies.

View solution

Q. A non-linear element has zero resistance.

View solution

Q. In a RL circuit, the angle, θ by which the current lags the voltage is

View solution

Q. Assertion (A): The Laplace transform of a ramp is 1/s².

Reason (R): The integral of a unit step function gives an impulse function.

View solution

Q. A certain network has two ideal voltages sources and a large number of ideal resistances. The power consumed in one of the resistances is 4 W when either of two sources is active and the other source is active and the other source is short circuited. When both sources is short circuited.When both sources are active, the power consumed in the same resistor would be

View solution

Q. A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be

View solution

Q. A 60 W, 23 V bulb is used for 45 minutes. The electrical energy consumed in commercial units is

View solution

Q. In an ideal current source, the source resistance is zero.

View solution

Q. A choke coil has a resistance to reactance ratio of 0.2. The power factor of the choke coil is

View solution

Q. Two capacitors of 1 μF and 2 μF are connected in series across a 10 V dc battery. After the capacitors have been charged, the charges across the two capacitors will be

View solution

Q. A series RLC circuit has Q = 5. A voltage of 10 V rms is applied to it. At resonance, the voltage across C is

View solution

Q. A capacitor having capacitance C is raised to voltage V. The energy stored will be

View solution

Q. In an R-L circuit, the impedance is 30 Ω at a frequency of 100 Hz. At 200 Hz, the impedance should be

View solution

Q. The electric energy required to raise the temperature of a given amount of water is 1000 kWh. If heat losses are 25%, the total heating energy required is __________ kWh.

View solution

Q. Two phasors having rms values V1 and V2 which are added to give a phasor having rms value V3. V3 is maximum if phase angle between V1 and V2 is

View solution