B r l w R m As shown in Figure 1, a long, straight wire carries a current I a) D

ID: 1679030 • Letter: B

Question

As shown in Figure 1, a long, straight wire carries a current I

a) Derive an algebraic expression for the

magnetic flux B through the wire

loop.

Hint:

due to current

of the wire loop. Figure 1.

b) Assume that the current

of the wire loop, and indicate that direction by circling the corresponding end of the

double-headed arrow in Figure 1.

c) Continue using Lenz’s Law and derive an algebraic expression for the magnitude

of the induced current

Hint:

expression for the net force on the wire loop.

Hint:

e) Determine the value of the rate of change of current

suspend the wire loop motionless against the downward force of gravity.

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