Q. Assertion (A): Operator has a value 1 ∠ - 90° or 1 ∠ 90°.

Reason (R): Operator 'a' has a value 1 ∠ 120°.

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Q. The maximum current and voltage ratings for a 0.5 W, 10 kW resistor are

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Q. The network has 10 nodes and 17 branches. The number of different node power voltages would be

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Q. Two capacitor of 1 F each are connected in parallel. Another 1 F capacitor is connected in series with the parallel combination. The total capacitance is

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Q. The realization of the term Ks yields

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

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Q. If A = 3 + j1 and B = 4 + j3, A + B =

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Q. When a constant voltage source and constant current source are in series, the current source is ineffective.

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Q. A system has transfer function 10/(s+1)(s+2). The dc gain is

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Q. In a series RLC circuit, the current at resonance is I₀ the total energy stored in the circuit at resonance is

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Q. If J, I and a denote current density, current and area of cross section of a conductor, then

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Q. If A = 3 + j1, A⁴

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Q. The sum of positive real functions

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Q. Twelve 1 Ω resistance are used as edges to form a cube. The resistance between two diagonally opposite corners of the cube is

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Q. A parallel RLC circuit has ω₀ = 10⁶ and Q = 30, Given C = 30 pF, the value of R is

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Q. Three identical coils each having self inductance L are connected in series so that the fluxes of all the three are in the same direction. If mutual inductance between each pair of coils is M, the total inductance of the arrangement is

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Q. In a resistive ac circuit, the current __________ the voltage by __________ .

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Q. When two coupled coils of equal self inductance are cormected in series in one way the net inductance is 12 mH and when they are connected in the other way the net inductance is 4 mH. The maximum value of inductance when they are connected in parallel is

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Q. An R-L series circuit is excited by a voltage v(t). The circuit was initially relaxed. Which of the following sources of v(t) would cause maximum current at t = 0+?

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Q. Power is drawn from a source at power factor 0.7. Pav = 300 watt. The reactive power is

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