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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Q. Two capacitors each of capacitance C and breakdown voltage V are joined in series. The capacitance and breakdown voltage of the combination is

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Q. A capacitor can be represented by a capacitance C in parallel with a resistance R. For a good capacitor, the resistance R should be

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Q. If a sheet of a mica is inserted between the plates of an air capacitor, the capacitance

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Q. A circuit has two branches 1 and 2 in parallel. If |Q1| = 8 KVAR and |Q2| = 6 KVAR, the magnitude of total kvar drawn form supply will be

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Q. When a function Z(s) having a pole at infinity is realized, we get

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Q. A specimen of a material has a resistivity of 1.78 x 10⁸ ohm-m. The material is

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

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Q. Two 2 port circuits are connected cascaded. To determine the response, it is more convenient to use

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Q. For addition and subtraction operations, phasors

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Q. If VA = - 10 V and VB = - 15 V, VAB = 5 V.

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