Q. Assertion (A): A complicated waveform can be replaced by sum or difference of two or more waveforms.

Reason (R): The method of superposition is applicable only to linear systems.

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Q. A circuit is fed by two sources of different frequency and magnitudes 100 ∠0° V and 50 ∠30°V. The current in a particular branch is 10 ∠20° A. If the magnitudes of the sources are changed to 200 ∠0° V and 100 ∠0° V, the current in that branch should be

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Q. In gases the flow of current is due to

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Q. A nickel cadmium cell is an alkaline cell.

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Q. When analysing two port networks in parallel it is more convenient to use

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Q. In ZRC (s) = 0 at s = ∞, the last element in first Cauer form is

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Q. The function H (s) is positive real if

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Q. In most electric irons, the thermister used for controlling temperature is

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Q. In the voltage equation v = 500 sin (1000t) V, the rms value of voltage is

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Q. A parallel ac circuit in resonance will

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Q. For a full rectified sine wave, the form factor and peak factor respectively are

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Q. For an RC admittance function Y,

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Q. When ac current is zero, no electrons are in motion.

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Q. A two port network is said to be reciprocal if

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Q. For the current wave i = 10 + 10 sin θ, the rms value is

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Q. The impedance parameter z21 is

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Q. Measurement of an unknown voltage with a dc potentiometer loses its advantage of open circuit measurement when

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Q. A parallel resonant circuit can be used

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Q. Which of the following theorems enables a number of voltage (or current) sources to be combined directly into a single voltage (or current) source?

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Q. If the numerator of Z(s) is one degree higher than denominator, Z(s) has a pole at infinity.

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