Question

A bar magnet of length 3 cm has points A and B along its axis at distances of 24 cm and 48 c
opposite sides. Ratio of magnetic fields at these points will be
А
B.
24 cm
48 cm
11.8
1
(2)
2/2
3) 3​

Answer 1

Answer:

Explanation:

The ratio of magnetic fields at these points are 8:1

Explanation:

Given that

Length of magnet = 3 cm

Distance between point a and center of magnet= 24 cm

Distance between point b and center of magnet= 48 cm

The magnetic field is

The magnetic field is inversely proportional to the cube of the distance.

We need to calculate the ratio of magnetic fields at these points

Using formula of magnetic field

Hence, The ratio of magnetic fields at these points are 8:1

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Topic : magnetic field