A wooden block performs SHM on a frictionless surface with frequency, `v_(0)`. The block carries a charge `+Q` on its surface. If now a uniform electric field `vec (E)` is switched on as shwon in figure., then the SHM of the block will be

Options

A. of the same frequency and with shifted mean position.
B. of the same frequency and with the same mean position.
C. of changes freqency and with shifted mean position.
D. of changed frequency and with the same mean position.l

Answer

A

Explanation

As frequency of oscillation of wooden block, `v_(0)=(1)/(2pi)sqrt((k)/(m))`, does not depend on constat external force due to electric field, hence the frequency of oscillation will be the same. But due to constant external force, the mean position of the wooden block gets shifted. Hence, option `(a)` is correct.