Item 5 MasteringPhysics 5 of 6 tem 5 A single-turn square wire loop 14.0 cm on a

Question

Item 5 MasteringPhysics 5 of 6 tem 5 A single-turn square wire loop 14.0 cm on a side carries a .55-A current. Part A What's the loop's magnetic dipole moment Express your answer with the appropriate units. : Value Units Submit Give Up Part B What's the magnitude of the torque the loop experiences when it's in a 2.12-T magnetic field with the loop's dipole moment vector at 65.0 to the field? Express your answer with the appropriate units. Value Units = Value Units Submit Give Up Continue > Continue

Explanation / Answer

5.

A. magnetic moment of loop is given by

magnetic moment = M = N*i*A

N = 1

i = 1.55 Amp.

A = side^2 = 0.14^2 = 0.0196 m^2

M = 1*0.0196*1.55 = 0.03038 A-m^2

B.

torque = MxB = M*B*sin A

B = 2.12 T

A = 65 deg

Torque = 0.03038*2.12*sin 65 deg = 0.05837 N-m

6.

In the solenoid

B = u0*N*i

B = 4*3.14*10^-7*3300*4.1*10^3 = 16.993

B = 17 T

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