Electromagnetic Fields Objective Questions – Set 1

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

In the left hand rule, forefinger always represents

A conductor of length L has carrying current I passing through it, when it is placed parallel to strong magnetic field. The force experienced by the conductor will be

A wire carrying current is bent in the form of a circular loop. Then the magnetic field around each portion of the wire will be

Cork Screw rule is used to find

It was suggested by _____________ that the electric field should be imagined to be divided into tubes of force containing a fixed number of line of force

The change of cross sectional area of conductor in magnetic field will affect

Inside a hollow conducting sphere

The energy stored in the magnetic field at a solenoid 30 cm long & 3 cm diameter wound with 1000 turns of wire carrying a current at 10 amp, is

Inside a hollow conducting sphere

Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be

Midway between two equal and similar charges, a third equal and similar charge is placed, then this third charged will

Conductor is constant and field is varying then emf will induce. This principle is called

The force between two long parallel conductors is inversely proportional to

A point pole has a strength of 4π × 10^-7 weber. The force in newtons on a point pole of 4π × 1.5 × 10^-4 weber placed at a distance of 10 cm from it will be

The field at any point on the axis of a current carrying coil will be

Ohm’s law in point from field theory can be expressed as

Two infinite parallel metal plates are charged with equal surface charge density of the same polarity. The electric field in the gap between the plates is

Two straight parallel conductors carry equal currents in opposite direction. The force between them is

As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the

A metal surface with 1 meter radius and surface charge density of 20 coulombs / m2 is enclosed in a 10 m side. The total outward electric displacement normal to the surface of the cube is

The drawback of Daltons atomic structure is that, it says

Two parallel plates are separated by a distance D charged by V volt. The field intensity E is given by,

A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at

Which of the following represents ohms law

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

The right hand rule for determining the direction of the induced EMF was introduced by

Electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its centre

Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s

Biot-Savarts law states the relation between magnetic intensity and