Question

A spring block system undergoes vertical oscillators above a large horizontal metal sheet with uniform positive charge. The time period of oscillation is $T$. If the block is given a charge $Q$, its time period of oscillation is:-

• A. $T$
• B. $<T$
• C. $>T$
• D. $>T$ if $Q$ is $+ve$ and $<T$ if $Q$ is $-ve$.

Answer 1

The correct option is A $T$

Through effective value of $g$ will change but as the time period of spring block system does not depend on $g,$

So$,$ time period will remain same$,$ $i,e.$ $T$

Hence,

option $\left(A\right)$ is correct answer.