Q. Three inductors each 30 mH are connected in delta. The value of inductance or each arm of equivalent star is

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Q. If the iron core of a coil is removed so that it becomes an air cored coil, its inductance

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Q. Energy = voltage x charge.

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Q. A coil is wound having a diameter d. Its inductance is 10 mH. If it is rewound on the same core with a wire having diameter 0.5 d and total weight of the wire is the same as before, the inductance will be

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Q. Permeability is analogous to

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Q. A resistance and an inductance are connected in parallel and fed from 50 Hz ac mains. Each branch takes a current of 5 A. The current supplied by source is

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Q. Assertion (A): The inductance of an iron cored solenoid is not constant.

Reason (R): BH curve of an iron specimen is non-linear.

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Q. Zinc oxide is a non-linear resistance.

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Q. A square current wave of magnitude 1 A is applied to an element for 5 seconds. The voltage across the element rises linearly from 0 to final value linearly. The element is

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Q. A periodic voltage v(t) = 1 + 4 sin ωt + 2 cos ωt is applied across a 1 ohm resistance. The power dissipated is

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Q. A constant k high pass p section has a characteristic impedance of 300 Ω at f = ∞ . At f = fc, the characteristic impedance will be

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Q. If A = 4∠7°, A² is

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Q. An RC driving point impedance function has zeros at s = - 2 and s = - 5. The admissible poles are

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Q. A 10 μF capacitor is charged from a 5 volt source through a resistance of 10 kΩ. The charging current offer 35 m sec. If the initial voltage on C is - 3 V is

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Q. If an admittance Y(s) has a term Ks, the realization would give

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Q. If the diameter of a wire is doubled, the current carrying capacity of the wire becomes

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Q. An RLC series circuit has R = 7.07 Ω, L = .707 H and C = 7.07 μF. At Half power frequencies the circuit impedance is likely to be

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Q. In a series R, L, C circuit the impedance triangle is the same when XL < XC and XL > XC .

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Q. The zinc can of a dry cell serves as positive terminal.

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Q. Two similar coils have self inductance of 1 mH each. Coefficient of coupling is 0.5. The mutual inductance M is

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