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Question: Two normal uniform magnetic field contain a magnetic needle making an angle 60° with F. Then the rat...

Two normal uniform magnetic field contain a magnetic needle making an angle 60° with F. Then the ratio of FH\frac { F } { H } is

A

1 : 2

B

2 : 1

C

3:1\sqrt { 3 } : 1

D

1:31 : \sqrt { 3 }

Answer

1:31 : \sqrt { 3 }

Explanation

Solution

oooopooooo

Sol. From figure at equilibrium

tan⁡60∘=HF\tan 60 ^ { \circ } = \frac { H } { F }

⇒ FH=13\frac { F } { H } = \frac { 1 } { \sqrt { 3 } }