Q. The model of a system

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Q. Q of a coil

A. increases with Q increasing frequency
B. varies linearly with frequency
C. increase with increasing frequency because R increases at high frequency
D. decrease after the peak frequency because R increases at H.F.

The correct statements are

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Q. The shot circuit admittance matrix of a two port network is

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Q. h parameters are used in transistor analysis.

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Q. At a temperature of 7 K, lead is a superconductor.

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Q. The dynamic impedance of an R-L and C parallel circuit at resonance is __________ ohm.

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Q. The hot resistance of a tungsten lame is about 12 times its cold resistance. Accordingly, the cold resistance of a 60 Ω, 120 V lamp is about __________ ohm.

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Q. The response of a function is decided by

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Q. A choke coil of resistance R and inductance L is shunted by capacitor C. The dynamic resistance is

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Q. In an LC immittance H (s)

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Q. The polar plot of P (jω) = 45° as ω varies from -∞ to ∞ is

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Q. Assertion (A): A graph is planar if it has a dual.

Reason (R): The dual of a graph can be found by window dot method.

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Q. The factor which will have least effect on the voltage at the load end of a two-wire supply circuit is

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Q. If a two port network is represented by an equivalent T network, the impedance of shunt arm in terms of ABCD parameters is equal to

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Q. In ZRC (s) = constant at s = 0, the last element in first Foster cauer realization is

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Q. In a series RLC high Q circuit the current peaks at a frequency.

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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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