Magnetism And Matter in General Science : Practice MCQ Questions & Answers with Explanations

A current carrying power line carries current from west to east. What will be direction of magnetic field 1 meter above it?

A magnetic dipole moment is a vector quantity directed from:

A magnetic needle is kept in a non-uniform magnetic field. It experiences

A wire of length I has a magnetic moment M. It is then bent into a semi-circular arc. The new magnetic moment is :

At a given place on earth's surface the horizontal component of earth's magnetic field is $2 \times 10^{-5}$ T and resultant magnetic field is $4 \times 10^{-5}$ T. The angle of dip at this place is

Curie law xT = constant, relating magnetic susceptibility (x) and absolute temperature (T) of magnetic substance is obeyed by

Curie temperature is the temperature above which

Ferrites may be:

In a bar magnet, magnetic lines of force z :

In a moving coil galvanometer, we use a radial magnetic field so that the galvanometer scale is :

Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator

Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator is

Magnetic moment for solenoid and corresponding bar magnet is

On quadrupling the moment of inertia of a magnet, its frequency of oscillation will become:

S.I. unit of flux is :

Tangent law is applicable only when:

The angle of dip at a certain place where the horizontal and vertical components of the earth's magnetic field are equal is

The dimensional representation of magnetic flux density is :

The earth behaves as a magnet with magnetic field pointing approximately from the geographic

The force between two parallel wire 2 × 10-7 Nm-1, placed 1 m apart to each other in vacuum. The electric current flowing through the wires is: