A charged particle is whirled in a horizontal circle on a frictionless table by attaching it to a string fixed at one pint. If a magnetic field is wsitched on in the vertical direction, the tension in the string

Options

A. will increase
B. will decrease
C. will remain the same
D. may increase or decrease

Answer

D

Explanation

`T_(1) = (mv^(2))/(R )`

`T + Bqv = (mv^(2))/(R )`

`T' - Bqv = (mv^(2))/(R )`