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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. If A = 3 + j1, A⁴

View solution

Q. The sum of positive real functions

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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+?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution