A man runs towards a mirror at a speed 15m/s. The speed of the image relative to the man is _______________.

The size of the Nano robots is reduced to ________ level to perform a task in very small space.

In semiconductors at a room temperature ________________.

In modulation process radio frequency wave is termed as ______________.

When the momentum of a particle increases the de Broglie wavelength is ______________.

In the photoelectric phenomenon, if the ratio of the frequency of incident radiation incident on a photosensitive surface is 1: 2: 3, the ratio of the photoelectric current is _____________.

The process of increasing the strength of a signal using an electric circuit is called ________________.

In the Ge sample, traces, of gallium is added as an impurity. The resultant sample would behave like_____________.

A photon of energy hv is absorbed by a free electrons of a metal having work function ф < hv _____________.

When the intensity of a light source is increased?

The intrinsic semi-conductor has ______________.

An a-particle of energy 10 meV is scattered through 180^o by a fixed uranium nucleus. The distance of the closest approach is of the order of _____________.

The total energy of electrons in the ground state of a hydrogen atom is -13.6 eV. The k.E of an electron in the first excited state is ____________.

Band spectra are obtained from _________.

A pure red glass plate when placed in the path of the light absorbs everything except__________.

Accelerated charges would produce _____________.

The existence of E.M. waves was confirmed experimentally by __________________.

The force on a proton moving with a speed of 10⁵ m/s perpendicular to a magnetic field 10^-3 tesla is ______

The magnetic declination for chennai is _______

The expression for water equivalent is _____________.

The unit of impedance is ________________

Consider the motion of a charged particle in a uniform magnetic field directed into the paper. If velocity v of the particle is in the plane of the paper, the charged particle will describe a _____________.

The direction of the magnetic force on a positive charge moving in a magnetic field is given by ________________.

The self-inductance Lof a solenoid is given as _________________.

Lenz's law is in accordance with the law of ________________.

Joules's heating effect is desirable in ___________________.

Electrical resistance is given by ___________________.

If the specific resistance of a potentiometer wire is 10^-7 Om and current flowing through it is 0.1 amp, cross-sectional area of wire is 10^-6 m², then potential gradient will be ________________.

The capacitance of a parallel plate capacitor increases from 5μf of 50μf when a dielectric is filled between the plates. The permitivity of the dielectric is

The unit for electric susceptibility is

The electric potential V as a function of distance x (metres) is given by V = ( 5x² + 10x -9) volt. The value of electric field at a point x = 1m is __________

The relative permittivity of water is _______.