# Choose the correct option. Let r be the distance of a point on the axis of a bar magnet from its center. The magnetic field at r is always proportional to - Physics

MCQ

Choose the correct option.

Let r be the distance of a point on the axis of a bar magnet from its center. The magnetic field at r is always proportional to

#### Options

• 1/"r"^2

• 1/"r"^3

• 1/"r"

• not necessarily 1/"r"^3 at all points

#### Solution

Let r be the distance of a point on the axis of a bar magnet from its center. The magnetic field at r is always proportional to 1/"r"^3

Concept: Magnetic Lines of Force and Magnetic Field
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#### APPEARS IN

Balbharati Physics 11th Standard Maharashtra State Board
Chapter 12 Magnetism
Exercises | Q 1. (i) | Page 227