A circular arc QTS is kept in an external magnetic field \[{{\overset{ – McqOptions

MCQOPTIONS

1.	A circular arc QTS is kept in an external magnetic field \[{{\overset{\to }{\mathop{B}}\,}_{0}}\] as shown in figure. The arc carries a cur- rent I. The magnetic field is directed normal and into the page. The force acting on the arc is
A.	\[2I{{B}_{0}}R\hat{k}\]
B.	\[I{{B}_{0}}R\hat{k}\]
C.	\[-2I{{B}_{0}}R\hat{k}\]
D.	\[-I{{B}_{0}}R\hat{k}\]
Answer» C. \[-2I{{B}_{0}}R\hat{k}\]

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