Electromagnetics

If a conductor's cross-sectional area is doubled and its length is halved, the value of its resistance will

If in looking at any one end of a solenoid, the direction of current flow is found to be clockwise then the end under observation is a south pole. This is known as

If you hold a conductor with right hand so that the stretched thumb points in the direction of the current, then, encircling fingers will give the direction of magnetic lines of force round the conductor. This is known as

Is the quantity of magnetizing force needed to counter balance the residual magnetism of a magnetic material.

It is composed of series of energy levels containing the valence electrons.

It is the energy of the highest energy electron of a metal at 0 degree Kelvin

Lenz' law states that the direction of the induced emf and hence current

Magnetic fields do not interact with

Magnetic intensity is a

One weber of flux is equal to _____ magnetic lines of force.

Refers to a force of field that exists between ions where they either repel or attract each other.

States that each electron in an atom must have a set of quantum numbers.

Suppose that there is an atom containing eight protons and eight neutrons in the nucleus, and two neutrons are added in the nucleus, the resulting atomic weight is about

The ability of a material to conduct magnetic flux through it.

The core of a magnetic equipment uses a magnetic material with

The core of a transformer heats up when its primary is fed from an ac source because of

The core of a transformer heats up when its primary is fed from an ac source because of

The emf induced in a coil due to the change in its own flux linked with it is called

The flux density in an air-cored coil is 10^-3 Wb/sq m. With a cast iron core of relative permeability 100 inserted, the flux density will become.

The force between two magnetic poles varies with distance between them. The variation is _____ to the square of that distance