Physics M.C.Q (1 Marks)

The device is based on the principle of mutual induction is:

In the given figure, an electron is moving from A to B. The direction of A induced current in the loop is:

A coil of copper and a wire AB are located in the plane of the paper as shown in the figure. If current I flowing through the wire is increasing, then the direction of induced current in the coil is:

Lenz's law gives:

Direction of induced emf is determined by:

A square loop of side 22 cm is converted into circular loop of 0.45. If uniform magnetic field of 0.2 T is perpendicular to the loop, then induced electromotive force in the loop is:

The self-inductance of a coil will be less when:

Transformer is based on the principle of:

In a induction coil, when current changes from 3 A to 2 A in 1 milli second, there is electric vapor of 5 volt. The self-inductance of the coil is:

Mutual inductance of two coils is M. If current change in time t in first coil is I, then induced emf in the second coil is:

A square loop of side l is moving with a constant velocity v in a uniform magnetic field. The magnitude of induced emf is:

Dimensions of coefficient of self-inductance is :

Two coils are kept close to each other. The factor on which the coefficient of mutual inductance for pair of coils depends:

In the given figure, a current of constant magnitude is flowing in the wire AB. Direction of induced current flowing through the wire is:

Which of the following unit is not free from error?

A conducting loop is kept in a uniform magnetic field such that its plane is perpendicular to the magnetic field. Induced emf will be generated in the loop if:

A copper ring is kept horizontal and a bar of magnet is dropped in the direction of the axis of the ring. The acceleration of the falling magnet will be:

A square conducting loop of side L and resistance R is moving in its plane with a uniform velocity v perpendicular to its one side, where magnetic induction is B which is constant in space and time and is normal to the inwards of the plane. Induced current in the coil is:

Which of the following will produce maximum electromotive force?

In the given figure, when key k is closed, then direction of induced current in the coil B IS:

In the given figure, conducting rod AB is moved in the direction of magnetic field developed by the current carrying conductor MN. The direction of generated induced current will be:

The surface shown in the figure does not represent:

The Lenz's law is based on which of the following physical quantity?