
(a)
The emf induced in the loop
(a)

Answer to Problem 66P
The emf induced is
Explanation of Solution
Write the equation for the emf induced in the loop.
Here,
Here,
It is given that the area of the loop is
Here,
Conclusion:
Substitute
The negative sign shows the existence of clockwise current due to the induced emf. Therefore, the emf induced is
(b)
The current in the loop
(b)

Answer to Problem 66P
The current in the loop is
Explanation of Solution
Write the equation for the angle
Here,
Substitute
Write the equation for the length of the arc
Here,
The length of the loop
The resistance per unit length of the loop
Write the equation for the induced current in the loop.
Here,
Conclusion:
Substitute
Therefore, the current in the loop is
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Chapter 23 Solutions
Principles of Physics: A Calculus-Based Text, Hybrid (with Enhanced WebAssign Printed Access Card)
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