A Rectangular (45 Cm Long by 22 Cm Wide)circuit Loop $\varOmega$

question 10

Multiple Choice

A rectangular (45 cm long by 22 cm wide) circuit loop with resistance 35 $\varOmega$ is held parallel to the xy-plane with one end inside a uniform magnetic field.The magnetic field for x < 0 is 1.8 T along +z axis,and for x > 0 the magnetic field is zero.Initially the left end of the loop is at x = -30 cm and the right end is at x = 15cm.Calculate the magnitude of the force required to move the loop to the right along the positive x-axis at a constant speed of 13 cm/s while the left end of the loop is still in the magnetic field.

• A)5.8 * 10^-4 N
• B)3.2 * 10^-4 N
• C)1.5 * 10^-3 N
• D)1.6 * 10^-2 N
• E)2.0 * 10^-2 N

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