The Figure Shows the Orientation of a Rectangular Loop Consisting $40 \hat { \mathbf { i } }$

question 112

Multiple Choice

The figure shows the orientation of a rectangular loop consisting of 80 closely wrapped turns each carrying a current I.The magnetic field in the region is ( $40 \hat { \mathbf { i } }$ ) mT.The loop can turn about the y axis.If $\theta$ = 30 $\degree$ ,a = 0.40 m,b = 0.30 m,and I = 8.0 A,what is the magnitude of the torque exerted on the loop?

• A)2.5 N .m
• B)1.5 N. m
• C)3.1 N . m
• D)2.7 N . m
• E)0.34 N . m

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