Question

1. If 55.1 cm of copper wire (diameter = 1.18 mm, resistivity = 1.69 × 10^-8Ω·m) is formed into a circular loop and placed perpendicular to a uniform magnetic field that is increasing at the constant rate of 12.6 mT/s, at what rate is thermal energy generated in the loop?

2. A rectangular loop (area = 2.7 m²) turns in a uniform magnetic field, B = 3.2 T. When the angle between the field and the normal to the plane of the loop is π/2 rad and increasing at 2.6 rad/s, what emf is induced in the loop?

Answer 1