COMEDK 2023 Morning Shift | Magnetism and Matter Question 1 | Physics

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 $$\operatorname{dip} \theta$$ is given by

$$\cot ^2 \theta=\cot ^2 \theta_1+\cot ^2 \theta_2$$

$$\tan ^2 \theta=\tan ^2 \theta_1+\tan ^2 \theta_2$$

$$\cot ^2 \theta=\cot ^2 \theta_1-\cot ^2 \theta_2$$

$$\tan ^2 \theta=\tan ^2 \theta_1-\tan ^2 \theta_2$$

COMEDK 2023 Evening Shift

MCQ (Single Correct Answer)

-0

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

$$\mu>1$$

$$\mu=1$$

$$\mu=0$$

$$\mu$$ is infinite

COMEDK 2023 Evening Shift

MCQ (Single Correct Answer)

-0

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 a magnet on the axial line of the magnet is $$10^{-4} \mathrm{~T}$$.

$$25 \mathrm{~Am}$$

$$100 \mathrm{~Am}$$

$$5 \times 10^{-2} \mathrm{~Am}$$

$$1 \times 10^{-4} \mathrm{~Am}$$

COMEDK 2022

MCQ (Single Correct Answer)

-0

A bar magnet of length $$6 \mathrm{~cm}$$, is placed in the magnetic meridian with $$N$$ pole, pointing towards the geographical north. Two neutral points, separated by a distance of $$8 \mathrm{~cm}$$ are obtained on the equitorial axis of the magnet. If $$B_H=1.2 \times 10^{-5} \mathrm{~T}$$. Then the pole strength of the magnet is

0.75 A-m$$^{2}$$

0.25 A-m$$^{2}$$

0.50 A-m$$^{2}$$

1.50 A-m$$^{2}$$

COMEDK Subjects