Q. Steady state conditions are considered to be achieved in R-L circuits at the end of __________ time constant.

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Q. Two impedances are connected in series. Three voltmeters are connected, one across each impedance and one across combination. The readings of all the three are equal. The phase angle between voltages across the two impedances is

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Q. In a series resonant circuit Q is more than 10. Then the lower half power frequency ω₁, and resonant frequency ω₀ are related as

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Q. If R, L, C are in parallel, the currents through L and C are equal in magnitude at resonance.

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Q. In all pure metals, temperature coefficient of resistance is positive.

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Q. Bandwidth will be

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Q. In carbon resistor colour code, the fourth band indicates tolerance.

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Q. For any given two port network, any parameter set can be determined from measurements made at the two ports.

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Q. For 200V r.m.s. value triangular wave, the peak voltage will be

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Q. When a lead acid battery is fully charged the colours of its positive and negative plates are

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Q. Network transients are due to

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Q. Assertion (A): In an R-L circuit having low resistance, current lags the voltage by nearly 90°.

Reason (R): Power factor of a series RL circuit is R/Z.

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Q. Two coils are so wound that 60% of the flux of one links the other. The coefficient of coupling is

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Q. In a sine wave, maximum rate of change of voltage occurs at

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Q. Which of the following statements is incorrect?

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Q. A two port network is symmetrical if

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Q. In a varistor, as the voltage increases beyond a certain value, its resistance

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Q. Current through a charging capacitor exhibits

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Q. A battery charger can drive a current of 5A with 1Ω resistance connected at its output. If it can charge 2 V battery at 7 A rate, its Thevenin's equivalent circuit will be

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Q. A two terminal black box contains one of the elements R, L, C. The black box is connected to 220 V as supply. The current is I, when a capacitance of 0.1 F is connected in series between the source and box, the current is 2I. The elements is

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