A particle of mass m and charge q is fastened to one end of a string of length. The other end of the string is fixed to the point O. The whole sytem liles on as frictionless horizontal plane. Initially, the mass is at rest at A. A uniform electric field in the direction shown in then switfched on. Then A. the speed of the particle when it reaches B is `sqrt((2qEl)/(m))`B. the speed of the particle when it reaches B is `sqrt((qEl)/(m))`C. the tension in the string when particle reaches at B is 2qED. the tension in the string when the particle reaches at B is qE

A particle of mass m and charge q is fastened to one end of a string o

1.	A particle of mass m and charge q is fastened to one end of a string of length. The other end of the string is fixed to the point O. The whole sytem liles on as frictionless horizontal plane. Initially, the mass is at rest at A. A uniform electric field in the direction shown in then switfched on. Then A. the speed of the particle when it reaches B is `sqrt((2qEl)/(m))`B. the speed of the particle when it reaches B is `sqrt((qEl)/(m))`C. the tension in the string when particle reaches at B is 2qED. the tension in the string when the particle reaches at B is qE
Answer» Correct Answer - B::C

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