In the figure, the rod moves to the right with a speed of 1.1 m/s and has a resi

Question

In the figure, the rod moves to the right with a speed of 1.1 m/s and has a resistance of 2.5 ? .(Figure 1) The rail separation is l = 26.0 cm . The magnetic field is 0.36 T , and the resistance of the U-shaped conductor is 22.5 ? at a given instant.

A)

Calculate the induced emf.

Express your answer to two significant figures and include the appropriate units

e = ______

B) Calculate the current in the U-shaped conductor

Express your answer to two significant figures and include the appropriate units

I = ______

C) Calculate the external force needed to keep the rod's velocity constant at that instant.

Express your answer to two significant figures and include the appropriate units

F= _______

Explanation / Answer

E = 0.36*0.26*1.1= 0.103 volts

current at that instant = 0.103/22.5 = 0.00457 amp

at this instant
force required = 0.36*0.00457*0.26 = 0.000427 N

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