1021. What is the internal resistance of an ideal current source :

A. O
B. 100
C. 1
D. Infinity *

1022. The following is the superposition theorem for a network with all linear elements and a few nonlinear ones:

A. Cannot hold at all *
B. Always hold
C. May hold on careful selection of elements values , source waveform and response
D. Holds in case of direct current excitations

1023. The relationship between charge distribution and the electric field is obtained by integrating :

A. Laplace equation
B. Lorentz gauge equation
C. Poisson Equation *
D. RWH equation

1024. Two materials having temperature coefficient of 0.004 and 0.0004 separately are participated in series. The sum of the temperature coefficients is about:

A. 0.08
B. 0.04
C. 0.001 *
D. 0.0001

1025. The circuit shown above is under steady state condition with the switch closed. The switch is opened at t=0 what is the time constant of the circuit ?

A. 0.1 S
B. 0.2 S *
C. 5 S
D. 10 S

1026. Number of fundamental cut-sets of any graph will be :

A. Same as the quantity of twigs *
B. Similar to the number of branches on a tree.
C. Same as the number of nodes
D. Equal to J

1027. What will be the equipotential surfaces by a pair of equal and opposite line charges ?

A. Spheres
B. Concentric cylinders
C. Non-Concentric cylinders *
D. None of the above

1028. While applying reciprocity theorem :

A. Initial conditions are taken into consideration
B. Impedances are real quantities
C. Admittances are real quantities
D. None of the above *

1029. Any waveform can be expressed in fourier series if :

A. Sampling conditions are satisfied
B. Diarchies conditions are satisfied
C. Maxwell’s conditions are satisfied
D. None of the above

1030. Which of the following materials is not an insulator ?

A. Diamond
B. Graphite *
C. Bakelite
D. Lucite