Magnetism and Matter | Physics JEE Main questions with Solutions

0

072920 77839
info@smartachievers.in

Topic Question Set

Q 1 :
Paramagnetic substances

A. align themselves along the directions of external magnetic field.

B. attract strongly towards external magnetic field.

C. has susceptibility little more than zero.

D. move from a region of strong magnetic field to weak magnetic field.

Choose the most appropriate answer from the options given below: [2024]

A, C only
B, D only
A, B, C, D
A, B, C only

1

2

3

4

(A) (A) align themselves along the directions of external magnetic field.

(C) has susceptibility little more than zero.

A, C only

Q 2 :
The coercivity of a magnet is $5 \times 10^{3}$ A/m. The amount of current required to be passed in a solenoid of length 30 cm and the number of turns 150, so that the magnet gets demagnetised when inside the solenoid is _____ A. [2024]

0%

(10) $L e n g t h o f s o l e n o i d (λ) = 30 c m, N o . o f t u r n s (n) = 150$ $a n d$ $H = 5 \times 10^{3}$ $A / m$

$W e k n o w n = \frac{N}{I} \Rightarrow I = \frac{N}{n}$

$I = \frac{5 \times 10^{3} \times 0.3}{150} = 10 A$

Want Us to Email you About Special Offers & Updates?