Q. A 2-terminal network consists of one of the RLC elements. The elements is connected to an ac supply. The current through the element is 1 A. When an inductor is inserted in series between the source and the element, the current through the element becomes 2 A. What is this element?

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Q. Consider the following statements for a driving point function F(jω):

1. Re F(jω) is an even function of ω and is 0 or positive for all values of ω.
2. Im F(jω) is an even function of ω and is 0 or positive for all values of ω.
3. Re F(jω) is an odd function of ω and is 0 or negative for all values of ω.
4. Re F(s) = 0 for Re s = 0.

Which one of the statements given above is/are correct?

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Q. Which of following is linear and bilateral parameter?

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Q. Permittivity has the units of F/m.

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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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