Q. If A = 7 ∠15, A² is

View solution

Q. The colour coding of a resistors shows 100 K, ± 10%. When the resistance was measured with an ohmmeter, it read

View solution

Q. The output voltage of a charger is

View solution

Q. Threshold of perception occurs at a current of about 1 mA.

View solution

Q. A current increasing at the rate of 1 A/s is passed through 1 F capacitor. At t = 0, i = 0. The charge stored after 1 second is

View solution

Q. An RL impedance function can also be realized as

View solution

Q. A step voltages is applied to RLC series circuit having R = 2 Ω, L = 1 H and C = 1 F. The transient current response will be

View solution

Q. Class C solid insulators should not be used above 100°C.

View solution

Q. Assertion (A): Superposition theorem can be used to find the output of a full wave rectifier excited by sinusoidal signal sources of different frequencies connected in series.

Reason (R): Superposition theorem is valid for all linear systems.

View solution

Q. The current through a 1 mH inductance is i(t) = 2.56 x 10¯² - 4 x 10³ t for 2 ≤ t ≤ 20 μ sec. The voltage across the inductor is

View solution

Q. A capacitor whose capacitance Ct = C₀ (1- cos ωt) is fed by a sinusoidal voltage v = V₀ sin ωt. The equation for current i is

View solution

Q. Assertion (A): In a circuit having high inductance, reactive power may be more than apparent power.

Reason (R): Reactive power = VI sin θ.

View solution

Q. A two branch parallel circuit has a 10 Ω resistance and 0.5 H inductance in one branch and a 100 μF capacitor in the second branch. It is fed from 100 V ac supply. At resonance, the source current is

View solution

Q. Insulation resistance of a cable is directly proportional to its length.

View solution

Q. For a series RLC circuit bandwidth is ω2 - ω₁ = R/2L.

View solution

Q. If Z(s) = (s² + 1)/s , the network has

View solution

Q. Maximum power transfer theorem finds application in

View solution

Q. In a series L-C circuit fed by ac voltage, voltage drops across L and C are 40 V and 30 V respectively. The supply voltage is

View solution

Q. In a reactance function

View solution

Q. A series resonant circuit has R = 2 Ω, L = 0.1 H and C =10 μF. At resonance applied voltage = 10 ∠0 V. Voltage across inductance is likely to be

View solution