A point charge q of mass m is placed in front of a uniformly charged infinite sheet and released. The surface charge density of sheet is sigma C m-2. The kinetic energy of charge after t second is [NCERT Pg. 39].
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Answer:
Kinetic energy after time t sec is
Explanation:
Infinite sheet provides constant electric field which is eual to,
Force acted upon charge q by this electric field, , which is also constant.
A constant force provide constant accleration.
Using and equating with force by electric field
we get,
Using newton's equation of motion,
where u is the initial velocity,
v is final velocity
and t is the time
Here, u=0,
velocity after t time is =
Kinetic enregy =
Kinetic energy=
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