# Magnetism and Matter · Physics · COMEDK

Start Practice## MCQ (Single Correct Answer)

COMEDK 2024 Evening Shift

A bar magnet is held perpendicular to a uniform field. If the couple acting on the magnet is to be halved, by rotating it, the angle by which it is to...

COMEDK 2024 Evening Shift

For a paramagnetic material, the dependence of the magnetic susceptibility $$\chi$$ on the absolute temperature is given as

COMEDK 2024 Morning Shift

Steel is preferred to soft iron for making permanent magnets because,

COMEDK 2023 Morning Shift

If $$\theta_1$$ and $$\theta_2$$ be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of $...

COMEDK 2023 Evening Shift

The magnetic permeability '$$\mu$$' a of a paramagnetic substance is :

COMEDK 2023 Evening Shift

Find the pole strength of a magnet of length $$2 \mathrm{~cm}$$, if the magnetic field strength $B$ at distance $$10 \mathrm{~cm}$$ from the centre of...

COMEDK 2022

A bar magnet of length $$6 \mathrm{~cm}$$, is placed in the magnetic meridian with $$N$$ pole, pointing towards the geographical north. Two neutral po...

COMEDK 2021

A bar magnet is oscillating in the earth's magnetic field with a period T. What happens to its period and motion, if its mass is quadrupled?

COMEDK 2021

The relative permeability of iron is 6000. Its magnetic susceptibility is

COMEDK 2020

The intensity of magnetic field due to an isolated pole of strength $$m_p$$ at a point distant $$r$$ from it will be

COMEDK 2020

The angle which the total magnetic field of
earth makes with the surface of the earth is
called

COMEDK 2020

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