Chapter 30: Q. 1 (page 868)
What is the direction of the induced current in FIGURE Q

Short Answer
The direction of the induced current is determined as, a counterclockwise current creates the next force , which tends to tends flux inside the loop.
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Chapter 30: Q. 1 (page 868)
What is the direction of the induced current in FIGURE Q

The direction of the induced current is determined as, a counterclockwise current creates the next force , which tends to tends flux inside the loop.
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A square loop has a resistance of . A CALC magnetic field perpendicular to the loop is , where is in Tesla andis in seconds. What is the current in the loop at ,and
FIGURE shows a U-shaped conducting rail that is oriented vertically in a horizontal magnetic field. The rail has no electric resistance and does not move. A slide wire with mass and resistance can slide up and down without friction while maintaining electrical contact with the rail. The slide wire is released from rest.
a. Show that the slide wire reaches a terminal speed , and find an expression for .
b. Determine the value of if and
An equilateral triangle on a side is in a uniform magnetic field. The magnetic flux through the triangle is . What is the angle between the magnetic field and an axis perpendicular to the plane of the triangle?
An square loop is halfway into a magnetic CALC field perpendicular to the plane of the loop. The loop's mass is and its resistance is . A switch is closed at , causing the magnetic field to increase fromtoin .
a. What is the induced current in the square loop?
b. With what speed is the loop "kicked" away from the magnetic field?
Hint: What is the impulse on the loop?
Equation 30.26 is an expression for the induced electric field CALC inside a solenoid . Find an expression for the induced electric field outside a solenoid in which the magnetic field is changing at the rate .
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