Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge Q

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5.Magnetism and Matter

easy

Two identical bar magnets are fixed with their centres at a distance $d$ apart. A stationary charge $Q$ is placed at $P$ in between the gap of the two magnets at a distance $D$ from the center $O$ as shown in the figure. The force on the charge $Q$ is

A

Directed along $OP$

B

Zero

C

Directed along $PO$

D

Directed perpendicular to the plane of paper

(AIPMT-2010)

Solution

Magnetic field due to bar magnets exerts force on moving charges only. Since the charge is at rest, zero force acts on it.

Standard 12

Physics

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