He recommended using the bullet proof car.

When a forward bias is applied to a p-n junction, it

In order to investigate the internal atomic structure of crystals, we make use of:

A spherical ball made of steel when dropped in mercury container will –

The wavelength produced by a He-Ne laser corresponds to the transition in:

Pycnometer is an instrument used to measure the –

The process involved in making soap is

Tungsten is used for the manufacture of the filament of an electric bulb, because –

Which of the following phenomena establishes the transverse nature of light waves?

One kilogram of ice at 0° C is mixed with one kilogram of water at 85° C. The final temperature of the mixture is