A semicircular wire of radius \( r \), carrying current \( \mathrm{...

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A semicircular wire of radius \( r \), carrying current \( \mathrm{I} \), is placed in a magnetic field of magnitude B. The force acting on it
(1) Can never be zero
(2) Can have maximum magnitude 2BIr
(3) Can have the maximum magnitude BIлr
(4) Can have the maximum magnitude Blr
\( \mathrm{P} \)
W
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