ELECTROMAGNETIC FIELD THEORY QUIZ

According to Coulomb’s law, the force of attraction or repulsion, between to electrical charges is

directly proportional to the square of the distance between them.

directly proportional to the distance between them.

inversely proportional to the square of the distance between them.

inversely proportional to the distance between them.

TRUE ANSWER : ?
YOUR ANSWER : ?

If the resistance of a conductor does not vary in accordance with the Ohms law it is known as

bad conductor.

non - linear conductor.

reverse conductor.

non - conductor.

TRUE ANSWER : ?
YOUR ANSWER : ?

The critical frequency of ‘F’ layer is greater than 30 MHz.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

Electric field strength of charge

Decrease with distance.

Decrease with square distance.

Increase square distance.

Increase distance.

TRUE ANSWER : ?
YOUR ANSWER : ?

In above problem, if the inductance L1 and L2 in series aiding with 30 mH mutual inductance, then total inductance will be

200 mH.

100 mH.

150 mH.

50 mH.

TRUE ANSWER : ?
YOUR ANSWER : ?

An infinite sheet has a charge density of 150 μ C/m. The flux density in μ C/m 2 is

1/75.

100.

75.

50.

TRUE ANSWER : ?
YOUR ANSWER : ?

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

a dipole and a monopole.

a monopole.

none of above.

a dipole.

TRUE ANSWER : ?
YOUR ANSWER : ?

If a and b are the dimensions of waveguide then

a = 2b

a = b/4

a = b

a = 3b

TRUE ANSWER : ?
YOUR ANSWER : ?

The heating time constant of an electrical machine gives an indication of its

cooling.

short time rating.

rating.

overload capacity.

TRUE ANSWER : ?
YOUR ANSWER : ?

Unit of electric flux density is

coulomb / meter2.

farad / meter.

weber / meter2.

coulomb.

TRUE ANSWER : ?
YOUR ANSWER : ?

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