ELECTROMAGNETIC FIELD THEORY QUIZ

The electric field on a plane is decribed by . The field due to

a monopole.

none of above.

a dipole.

a dipole and a monopole.

TRUE ANSWER : ?
YOUR ANSWER : ?

The magnetic vector potential due to a single conductor carrying current is

none of tha above.

infinite.

zero.

finite.

TRUE ANSWER : ?
YOUR ANSWER : ?

The statement which is not correct from the following:

Gauss’s law states that total electric flux through any surface is equal to the total charge enclosed by surface.

Gauss’s static that divergence of D = ρu.

An electric flux line is an imaginary path or a line drawn in such a way, that its direction at any point is the direction of electric field at that point.

For a uniform long charged line with l1 c/m the electric field intensity E is given as E = ρL/(π ε0.r).

TRUE ANSWER : ?
YOUR ANSWER : ?

In a dielectric material an applied field in x direction Ex = 5 v/m gives a polarization of px = 3/10π ux nc/m2. The susceptibility of the material is

Zero.

Infinity.

2.16.

4.32.

TRUE ANSWER : ?
YOUR ANSWER : ?

A wire 1 m long carries a current of 5A and is at an angle of 30o with B = 1.5 wb/m2. Magnitude of force is

5 N.

2 N.

2.5 N.

3.75 N.

TRUE ANSWER : ?
YOUR ANSWER : ?

Find H for centre of solenoid having finite length d = 1 unit where N = no of turns = 500, I = 2 A.

1000.

100.

None of these.

500.

TRUE ANSWER : ?
YOUR ANSWER : ?

Electric field intensity (E) at ant point in an electric field is equal to

potential gradient.

(potential gradient)1/2.

(potential gradient)1/3.

(potential gradient)2.

TRUE ANSWER : ?
YOUR ANSWER : ?

The shape of B-H curve for air gap is

ellipse.

parabola.

hyperbola.

straight line.

TRUE ANSWER : ?
YOUR ANSWER : ?

The ability of charged bodies to exert force on one another is attributed to the existence of

electrons.

protons.

electric field.

neutrons.

TRUE ANSWER : ?
YOUR ANSWER : ?

An emf of 16 volts is induced in a coil of inductance 4 H. The rate of change of current must be

64 A / s.

4 A / s.

32 A / s.

16 A / s.

TRUE ANSWER : ?
YOUR ANSWER : ?