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

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

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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

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Q. The pole of a reactive function

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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°.

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Q. A resistance R, inductance L and capacitance C are in series. The source frequency is adjusted to be equal to resonant frequency. The lower half power frequency is ω₁. Another resistance R is added in series with the circuit. The new lower half power frequency will be

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Q. The strength of controlled voltage source depends on

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

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

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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?

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Q. Ohm's law is valid for

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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

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Q. Stray capacitance is important at low frequencies.

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Q. A non-linear element has zero resistance.

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

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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.

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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

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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

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

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

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