Question

1. A square loop whose sides are 6.0-cm long is made with copper wire of radius 1.0 mm. If a magnetic field perpendicular to the loop is changing at a rate of 5.0 mT/s, what is the current in the loop?

2. A long solenoid with n = 10 turns per centimeter has a cross-sectional area of 5.0 cm2 and carries a current of 0.25 A. A coil with five turns encircles the solenoid. When the current through the solenoid is turned off, it decreases to zero in 0.050 s. What is the average emf induced in the coil? Round to three sig figs.

3. A coil of 1000 turns encloses an area of 25 cm2 . It is rotated in 0.010 s from a position where its plane is perpendicular to Earth’s magnetic field to one where its plane is parallel to the field. If the strength of the field is 6.0 × 10−5 T, what is the average emf induced in the coil?

Answer 1

Hi bloke,

I tried my hard best to solve question 3 as well but didn't arrive to the satisfactory answer. Please rate my first two question.

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