The number of wavelength of waves passing through a point in one secnd is called:

High pitch means:

A device which has two ways communication is:

SI unit of electric potential is:

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

The S.I unit of electric current is:

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

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

Value of ‘k’ depends upon:

Which statement of the following is false for primary memory?

What happen to the atomic number of an element which emits one alpha particle?

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