NCERT Solutions for Chapter: Fun with Magnets, Exercise 1: Exercise

A magnetic compass is placed just beside a bar magnet. Will the compass now show directions correctly? Explain your answer.

A toy car (made of soft iron) and two bar magnets are arranged as shown in the figure. What would happen if magnet 'A' moved towards the car as shown in the figure?

Consider a magnet which is hung to the hook of a spring as shown in figure. Then what could be the possible option from the following?

(a) X, A are north pole and Y, B are south pole

(b) X, B are north pole and Y, A are south pole

(c) A, B are south pole and X, Y are north pole

(d) X, A are south pole and Y, B are norh pole

Dipping a bar magnet into a box of iron filings results in a large number of iron filings sticking to the poles or ends than at the centre portion because_____.

The effective length of the first magnet is two times that of the second magnet. The effective length of the third magnet is one-third of the first magnet. If the effective length of the second magnet is $7.5 \mathrm{cm}$, the effective length of the third magnet is _____.

Consider a magnet which is hung by the hook of a spring as shown in figure. Then what could be the possible option from the following to attain the final position shown in the figure.

Calculate the effective length of magnet 'R' if the effective length of magnet 'P' is twice of magnet 'Q' and the effective length of 'R' is thrice of 'P' and the effective length of 'Q' is $10 \mathrm{cm}$.

The north and south poles of a bar magnet are situated $0.4 \mathrm{cm}$ inside the geometric ends of the magnet. If the geometric length of the magnet is $6 \mathrm{cm}$, then its effective length is ______$\mathrm{mm}$ .