CBSE 12 Physics Question Paper-2020 Set-3

A charge Q is uniformly distributed over the surface of a spherical shell of radius R. The work done in bringing a test charge Q0 from its centre to its surface is

A zener diode has

Two capacitors of capacitances C1 and C2 are connected in parallel. If a charge Q is given to the combination, the ratio of the charge on the capacitor C1 to the charge on C2 will be

The electrical resistance of a conductor

In Bohr’s model of hydrogen atom, the total energy of the electron in nth discrete orbit is proportional to

The electric flux emerging from a 1 C charge is

A proton enters a region with a uniform magnetic field at a 45° angle. The proton moves in the shape of

A charge Q is kept at the center of a circle of radius r. A test charge q0 is carried from a point X to the point Y on this circle such that arc XY subtends an angle of 60° at the center of the circle. The amount of work done in this process will be

The magnetic force on a current-carrying conductor in a magnetic field depends on

The energy stored in a capacitor is proportional to

A current-carrying wire placed in a magnetic field experiences a force. This force is directly proportional to

In the photoelectric effect, the number of emitted photoelectrons is proportional to

In Young’s double-slit experiment, if the wavelength of light is increased, the fringe width will

The refractive index of a medium is defined as

The force between two charges is inversely proportional to the square of the distance between them according to

The magnetic field around a current-carrying conductor can be determined using

A transformer operates on the principle of

The electric potential energy of a system of charges is

The self-inductance of a coil is a measure of its ability to

In an ideal capacitor, the current flowing through it is related to the voltage across it by

The potential difference between two points is a measure of the

In a moving coil galvanometer, the deflection is proportional to

A charged particle moving with velocity v enters a magnetic field at right angles to its velocity. The radius of its path depends on

The magnetic force acting on a conductor is maximum when

The force between two charges is inversely proportional to the square of the distance between them according to

The electric potential energy of a system of charges is

A transformer operates on the principle of

A charged particle enters a region of a magnetic field. The direction of the force on the particle is determined by

The magnetic field around a current-carrying conductor can be determined using

The force between two charges is directly proportional to