The value of refractive index of water is:

When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90° is called:

What is the direction of the magnetic field lines inside a bar magnet?

The cathode ray oscilloscope consists of main parts:

When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate:

The line which passes through pole of the mirror and center of curvature is called principal:

According to coulomb’s law, what happens to the attraction of two oppositely charged objects as their distance of separation increases:

A positive electric charge:

George Boole invented:

The output of a NAND gate is 0 when:

Which device is used to increases / decreases A.C Voltage?

Eight bits combine to form:

____________is a study of magnetic effects of current

Shape of Magnetic lines of force in straight Conductor are.

Direction of Magnetic lines of force in straight conductor is found by:

If the current is induced in n circuit due to ·change of current in an other circuit the process is known as:

The coil of transformer in which change in current produces induced current in another coil is known as:

Type of transformer which is used to increase the value of alternating voltage:

Voltage of current supplied_________to consumers ls:

Electromagnet is used in device

Which is an electric switch that opens and closes under the control of another electrical circuit

Electric power is usually generated at places which are far from ‘the places where it is:

A practical application of mutual induction is:

Walk through metal detector are installed at airport and other places for

A transformer has 100 turns in primary and 500 turns in the secondary. If 6 Volts D.C is applied across its primary, the voltage induced across its secondary would be: