1.

Time period of a block when suspended from the upper plate of a parallel plate capactor by a spring of stiffness `k` is when block ids unchanged If a change `g` is given to the block then new time period of oscilation will be A. `T`B. `gtT`C. `ltT`D. `ge T`

Answer» Correct Answer - A
The force that act on the block are `qE mg `and spring force since `qE` and `mg` are constant force the only variable elactic force change by `kx` where `x` is elongation in the spring
Unbalanced (restoring) force
`F = - kx`
`or - m omega^(2) x = - kx`
`or, omega = sqrt((k)/(m))`
`T = (2m)/(omega) = 2pi sqrt((m)/(k))`


Discussion

No Comment Found

Related InterviewSolutions