Q. A capacitor used for power factor correction in single- phase circuit decreases

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Q. Which one of the following is an active component?

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Q. A h is the unit of quantity of electricity.

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Q. All network theorems of dc are applicable to ac also with different quantities taken as phasors.

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Q. An ac circuit has two branches in parallel. The impedances of the two branches are equal. Their power factors are 0.8 lagging and 0.8 leading. The overall p.f. is

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Q. In a network

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Q. The phase difference between them is __________ degrees.

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Q. Norton's theorem reduces a two terminal network to

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Q. For a two- port reciprocal network, the output open circuit voltage divided by the input current is equal to

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Q. If H(s) is positive real, 1/H(s)

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Q. Open-circuit voltage is the potential difference between two point when the impedance between these points is

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Q. A capacitor is considered to be completely charged in __________ time constant.

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Q. Consider the following statements associated with two port networks.

1. Z12 = Z21
2. Y12 = Y21
3. h12 = h21
4. AD - BC = 1

Which one of the statement given above are correct?

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Q. Assertion (A): The number of basic loops is equal to number of links.

Reason (R): The graph theory helps in choosing independent variables in circuit analysis.

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Q. In an R-L-C circuit, v(t) = 20 sin (314 t + 5 π/6) and i(t) = 10 sin (314 t + 2π/3). The p.f of the circuit is

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Q. A network has two sources of different frequencies. The only method of analysis which can be used to find current and voltages of different branches is the use of

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Q. For a series R-L-C circuit tuned at resonant frequency which of the following statements is correct?

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Q. A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled, then the voltage across each resistor is

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Q. If operator 'a' = 1 ∠120° then (1 + a + a²) =

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Q. In any network of linear impedances the current flowing at any point equal to algebric sum of currents caused to flow at that point by each of the emf taken separately with all other emfs reduced to zero. The statement represents.

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