A particle of mass m and charge q is fastened to one end of a string of length l. the other end of the string is fixed to the point O. the whole system lies on a frictionless horizontal plane. intially, the mass is at rest at A. A uniform electric field in the direction shown is then switched on. then find speed of the particle and tension in the string when the particle reaches at B.

Avneet Kaur , 11 Years ago

Grade 12