Under which of the following conditions will a convex mirror of focal length f produce an image that is erect diminished and virtual _____________.

A point source of light B is placed at a distance L in front of the center of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance of 2 L front it as shown. The greatest distance over which he can see the image of the light source in the mirror is ___________.

An object is at a distance of 0.5 in front of a plane mirror. Distance between the object and image is ___________.

The resolving power of a microscope is limited by the ______ of the radiation used.

Below the threshold frequency, if the intensity of radiation is increased, the emission of photoelectrons _______

The particle which has zero mass but has energy is _____________.

Light frequency v falls on material of threshold frequency v_o, the maximum K.E of emitted electron is proportional to ____________.

When the intensity of a light source is increased?

J.J. Thomson discovered ________

The energy of the electron in the first orbit of hydrogen atom is -13.6 eV. Its potential energy is _______________.

Millikan's oil drop experiment established that is ____________.

_________ emission spectrum is used to identify the gas used.

A magnetic field is produced by ____________.

The unit of Galvanometer constant is ________

Force on unit length of two parallel wires carrying equal current kept apart by 3m in air is 2 x10^-7 N, then the current in each wire is ______

Ampere's circuital law is another form of ____________________.

The property of a coil which enables to produce an opposite induced emf in it when the current in the coil changes is called _______________

A long straight conductor carrying a current lies along the axis of a ring. The conductor will exert a force on the ring if _______________.

Transformer works on _____________.

Conductor which obey ohm's law are called ______________.

In an electrical arrangement as shown the equivalent resistance between X and Y will be

Temperature co-effieient of resistance for metals is ______________.

What will happen if two conducting spheres are separately charged and then brought in contact?

Eight mercury droplets having a radius of 1 mm and charge of 0.066 PC each merge to form one droplet. Its potential is _____________

The figure shows tow parallel equipotential surface A and B kept at a small distance 'r' a part from each other. A point change of Q coulomb is taken from the surface A to B. The amount of net work done will be