A block of mass is suspended vertically with a spring of spring constant

PHYSICS · Single correct · CBSE · Physics · Oscillations · Oscillations

Problem

A block of mass

m

is suspended vertically with a spring of spring constant

k

. The block is made to oscillate in a gravitation field. Its time period is found to be

T

. Now the space between the plates is made gravity free, and an electric field

E

is produced in the downward direction. Now the block is given a charge

q

. The new time period of oscillation is (1)

T

(2)

T+2\pi\sqrt{\frac{qE}{md}}

(3)

2\pi\sqrt{\frac{qE}{md}}

(4) none of the above