Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1.

A sphere of mass m moving with velocity v collides head -on on another sphere of same mass which is at rest. The ratio of final velocity of second sphere to the initial velocity of the first sphere is (where, e is coefficient of restitution and collision is inelastic)A. `(e-1)/(2)`B. `e/2`C. `(e+1)/(2)`D. e

Answer» Correct Answer - C
Moment before Collision = moment after collision
`mV+ 0 =m V_(1) +m V_(2)`
`e = (v_(2)-v_(1))/(u_(1) -u_(2))therefore v_(1) =v-v_(2)`
`e =(v _(2)- v_(1))/(v )` substitute `v_(1)`
`e= (v_(2)- v - v_(1))/(v)`
Discussion
2.

The expression for electric field intensity at a points outside uniformly charged thin plane sheet is (where, d is the distance of point from plane sheet)A. independent of dB. directly proporational to `sqrtd`C. directly proporational to dD. directly proporational to `(1)/(sqrtd)`

Answer» Correct Answer - A
Discussion