Mastering Physics Solutions: Exercise 20.6

Mastering Physics Solutions: Exercise 20.6

On May 25, 2012, in Chapter 20: Electromagnetic Induction and Waves, by Mastering Physics Solutions

Part A = 0.33 m2 Click to use the calculator/solver for this part of the problem
Part B = 42 V Click to use the calculator/solver for this part of the problem
Part C = 83 V Click to use the calculator/solver for this part of the problem

A uniform magnetic field is at right angles to the plane of a wire loop. The field decreases by 0.25 T in 1.0*10^−3 s and the magnitude of the average emf induced in the loop is 83 V.

What is the area of the loop?
What would be the value of the average induced emf if the field change was the same but took twice as long to decrease?
What would be the value of the average induced emf if the field decrease was twice as much and it also took twice as long to change?

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Mastering Physics Solutions: Exercise 20.7

Mastering Physics Solutions: Exercise 20.7

On May 23, 2012, in Chapter 20: Electromagnetic Induction and Waves, by Mastering Physics Solutions

Part A = 1.7 V Click to use the calculator/solver for this part of the problem
Part B = 0.44 V Click to use the calculator/solver for this part of the problem

A square loop of wire with sides of length 40 cm is in a uniform magnetic field perpendicular to its area.
If the field’s strength is initially 120 mT and it decays to zero in 0.011 s, what is the magnitude of the average emf induced in the loop?
What would be the average emf if the sides of the loop were only 20 cm?

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