Q. A step voltage E is applied to an R-L series circuit. At t = 0, the current in the circuit is

View solution

Q. To find current in a resistance connected in a network, Thevenin's theorem is used VTH = 20 V and RTH = 5 Ω. The current through the resistance

View solution

Q. A step voltage E is applied to a series R-L circuit. The rate of change of current is maximum at t =

View solution

Q. An RC circuit initially at rest has a step signal. The response V(t) across C is V(t) = 1 - e^(-at), If now there is an initial voltage on C of 2 volts for the same step signal, V(t) is now

View solution

Q. A series circuit having R = 3 Ω and L = 2 H is excited by a 10 V battery. At t = 0+, di/dt is

View solution

Q. Two currents have the same peak value. Wave 1 is sinusoidal and wave 2 is rectangular. The ratio of their heating effects are

View solution

Q. A parallel RLC network has R = 4Ω, L = 4H, C = 0.25F. Then at resonance Q =

View solution

Q. Three resistances of 15 Ω, 10 Ω and 3 Ω are connected in parallel. The overall resistance is

View solution

Q. If Y(s) = s² + 1/s , the network has

View solution

Q. The total inductance of two coils is 60 mH in series aiding connection and 40 mH in series opposing connection. The mutual inductance between coils is

View solution

Q. A network has 10 nodes and 17 branches. The number of different node pair are

View solution

Q. In a series RC circuit Z = (R² + ω²C²)^0.5.

View solution

Q. If V = 20 + j20, then loge(A) A is

View solution

Q. In an ac network the sum of currents entering a node is 10 ∠45°. The sum of currents leaving the node is

View solution

Q. In an RC series circuit excited by dc voltage E, the current at t = 0 is

View solution

Q. The current through a 10 Ω resistance in a dc circuit having two emf sources is 3A. If this resistance is changed to 20 Ω, the new value of current will be

View solution

Q. An RLC series circuit has R = 30 Ω, XL = 30 Ω and XC = 30 W. Its impedance is

View solution

Q. R, L and C are in parallel. The circuit is switched on to a constant current source I at t = 0. At t = ∞ the current through inductance is I.

View solution

Q. As temperature increases, the temperature coefficient of metals increases.

View solution

Q. In a 3 phase system, the zero sequence component of line to line voltages is zero

View solution