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A electric dipole is in equilibrium havi...

A electric dipole is in equilibrium having charge `q` and `-q` are placed at distance `'d'` are placed at distance `'d'` in a uniform electric filed `E`. Each charge has mass `'m'`. If dipole is displaced by small angle. Then its angular frequency of oscillation.

A

` sqrt (( qE ) /(2 md )) `

B

` sqrt ((qE)/(md)) `

C

`sqrt ((2qE)/(md )) `

D

`2 sqrt ((qE)/(md)) `

Text Solution

Verified by Experts


` tau = PE sin theta `
` I prop = q. dE sin theta , prop = ( q dE ) /(I ) sin theta `
As ` theta ` is small ` alpha = ( qdE ) /( I ) theta `
` omega = sqrt (( qdE ) /( I )),` where ` I = 2. m ( d ^ 2 ) /(4 ) `
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