1.

Two particles, carrying charges -q and +q and having equal masses m each, are fixed at the rod is clamped at an end and is placed in a uniform electric field E with the axis of the dipole along the electric field. The rod is slightly tlted and then released. Neglecting gravity find the time period of small oscillations.

Answer»

Solution :Consider the ROD to be a SIMPLE PENDULUM
For simple pendulum
` T=2pisqrt(l/g) `
` (l=length,g=accln) `
Now force experienced by the charges
` F=EQ `
Now, `accln =F/m=(Eq)/m `
Here,`length =a `
So, time periode
` T=2pisqrt((ma)/(qE))`


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