Question

The magnetic field in the region between the poles of an electromagnet is uniform at any time, (1 point) but is increasing at the rate of 0.090 T/s. The area of the conducting loop in the field is 110 cm2. What is the magnitude of the induced emf?
A. 0.12 mV
B. 0.99 mV
C. 0.31 mV
D. 0.82 mV

Answer 1

Answer:

B)

The magnitude of induced emf in the conducting loop is 0.99 mV.

Explanation:

Rate of increase in magnetic field per unit time = 0.090 T/s

Area of the conducting loop = 110 cm^2 = 0.0110 m^2

Electromagnetic induction is the production of an emf or voltage in a coil of wire due to a changing magnetic field through the coil.

Induced e.m.f is given as:

EMF = (-N*change in magnetic field/time)*Area

EMF = rate of change of magnetic field per unit time * Area

EMF = 0.090 * 0.0110

EMF = 0.00099 V

EMF = 0.99 mV