A) \[mg\,\sin \theta +qB\sqrt{2g\,R\,\sin \,\theta }\]
B) \[3\,mg\,\sin \theta +qB\sqrt{2g\,R\,\sin \,\theta }\]
C) \[mg\,\sin \theta -qB\sqrt{2g\,R\,\sin \,\theta }\]
D) \[3\,mg\,\sin \theta -qB\sqrt{2g\,R\,\sin \,\theta }\]
Correct Answer: B
Solution :
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