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

Q. Magnetic effect of current is used in generators but not in motors.

View solution

Q. For a nonlinear resistance

View solution

Q. Assertion (A): For a physically realisable driving point function, the degree of numerator and denominator should be equal.

Reason (R): The sum of positive real functions is real.

View solution

Q. An R-L series circuit has R = 5 Ω and L = .01 H. It is fed by ac 50 Hz supply. The rms current in the circuit is 5 A. The active power supplied by the source is

View solution

Q. A particular current is made up of two components 10A dc and sinusoidal current of peak value 14.14A. The average of resultant current is

View solution

Q. Assertion (A): In series R-L-C circuit, the current may lead or lag the voltage depending on the value of R.

Reason (R): Phase angle of an R-L series circuit is tan¯¹ (ωL/R).

View solution

Q. A planar graph has 6 nodes and 7 branches. The number of meshes in the dual graph is

View solution