Suppose the rectangular wire loop with a resistance of 4.0 enters the magnetic f

Question

Suppose the rectangular wire loop with a resistance of 4.0 enters the magnetic field as shown in the figure, moving to the right at 29 cm/s . (Figure 1)

A) What is the magnitude of the induced current? Express your answer to one significant figure and include the appropriate units.

B) What is the direction of the induced current?

C) Later the loop is fully in the field, still moving at 29 cm/s . What is the magnitude of the induced current? Express your answer to one significant figure and include the appropriate units.

D) What is the direction of the induced current?

E) Eventually the loop begins to emerge from the field, still at 29 cm/s . What is the magnitude of the induced current? Express your answer to one significant figure and include the appropriate units.

F) What is the direction of the induced current?

Explanation / Answer

A)
Emf induced = -Bbv where B is the magnetic induction, b is the breadth and v is the velocity of the loop.
Current = Emf/ resistance = -Bbv/R = - 0.85*0.08*0.29 /4
= 0.00140 A
B)The direction of the induced current in the loop is such that it opposes the change in the flux.
C) The flux is cut at the rate of 0.29m/s . The same current persists.

D)The direction of the induced current in the loop is such that it opposes the change in the flux.
E) The flux is cut at the rate of 0.29m/s. The same current persists.

F)The direction of the induced current in the loop is such that it opposes the change in the flux.

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