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Problem
Problem
An electron having kinetic energy
K
K
K
is moving in a circular orbit of radius
R
R
R
perpendicular to a uniform magnetic induction. If kinetic energy is doubled and magnetic induction tripled, the radius will become (a)
2
R
3
\frac{2R}{3}
3
2
R
(b)
2
3
R
\frac{\sqrt{2}}{3} R
3
2
R
(c)
2
3
R
\sqrt{\frac{2}{3}} R
3
2
R
(d)
2
3
R
\frac{2}{\sqrt{3}} R
3
2
R
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