ge-Indiana Universit xCourse Home MasteringPhysics: Ch 20 Hw7 Secure https://ses

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ge-Indiana Universit xCourse Home MasteringPhysics: Ch 20 Hw7 Secure https://session.masteringphysics.com/myct/itemView?assignmentProblemiD-91370976 Ch 20 HW7 roblem 20.36 7 of 8> Part A Constants If it is placed in a uniform 3.0 T magnetic field, find the torque this field exerts on the coil if the normal to the plane of the coil is oriented perpendicular to the field. A col having 179 tuns and a radius of 1.4 cm carries a arent of 1.65A. Express your answer in newton meters to two significant figures 0.2658 N m Submit X Incorrect: Try Again; 5 attempts remaining PartB If it is placed in a uniform 3.0 T magnetic field, find the torque this field exerts on the coil if the normal to the plane of the coil is oriented parallel to the field Express your answer in newton meters to two significant figures

Explanation / Answer

(A) torque = u x B = u B sin(theta)

u = N I A = 179 x 1.65 x (pi 0.014^2)

B =3 T  

theta = 90 deg  

torque = 0.546 N m ..........Ans

(B) now theta = 0 deg  

and sin(0) = 0

hence torque = 0

(C) now theta = 30 deg  

so torque = 0.546 sin30 = 0.273 N m

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