Acoil is wrapped with 300 turns of wire on the perimeter of a square frame (side length = 20 cm). each turn has the same area as the frame, and the total resistance of the coil is 1.5 ω. a uniform magnetic field perpendicular to the plane of the coil changes in magnitude at a constant rate from 0.50 t to 0.90 t in 2.0 s. what is the magnitude of the induced emf in the coil while the field is changing?

EMF = 2.4 V

Explanation:

As we know by Lenz law that induced EMF is given by rate of change in magnetic flux in the coil

As we know that magnetic flux is given by

here we know that

now we for induced EMF we have

here we have

33: i think it’s b

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.