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

Q. A current of 1 A in the coil of an iron cored electromagnet cause a flux density of 0.2.T. If the current is 2 A, B=

View solution

Q. In a practical current source, the load current

View solution

Q. A resistor R of 1 Ω and two inductor L1 and L2 of inductances 1 H and 2 H respectively, are connected in parallel. At some time, the current through L1 and L2 are 1 A and 2 A, respectively. The current through R at time t = ∞ will be

View solution

Q. A 10 ohm resistance and a 10 ohm capacitor are connected in series across a 100 V ac supply. The rms voltage across resistance is

View solution

Q. When a 10 K, 10%, 1/4 Ω resistor is connected in series with a 12 K, ± 1%, 1/4 Ω resistor, the resulting combination has the following specifications

View solution

Q. An m derived low pass filter has fc = 1000 Hz and m = 0.6. This filter will have infinite attenuation at

View solution

Q. A current 10 sin (200t) A flows through a 5 mH inductance. The expression for voltage is

View solution

Q. If operator 'a' = 1 ∠120° then (1 + a) =

View solution

Q. A current wave is i = 100e^(-60t) The initial and final values of current are

View solution

Q. Assertion (A): The impedance of a series resonant circuit is minimum at resonance.

Reason (R): Resonance condition implies unity power factor condition.

View solution

Q. The internal impedance of a source is 3 + j 4 Ω. It is desired to supply maximum power to a resistive load. The load resistance should be

View solution

Q. The internal impedance of a source is 3 + j 7 Ω. For maximum power transfer, load impedance should be

View solution

Q. A wave trap is a

View solution

Q. In an ac series RLC circuit the maximum phase difference between any two voltages can be

View solution

Q. In a series circuit with XL constant and R variable the current locus lies in the third quadrant.

View solution

Q. One coulomb charge is equal to the charge on

View solution

Q. Two capacitors of 16 μF each are connected in series. Another capacitor of 16 μF is connected in parallel with this combination. The total capacitance will be

View solution

Q. Assertion (A): Operator has a value 1 ∠ - 90° or 1 ∠ 90°.

Reason (R): Operator 'a' has a value 1 ∠ 120°.

View solution

Q. The maximum current and voltage ratings for a 0.5 W, 10 kW resistor are

View solution