Question

A flat square coil of wire with 15 turns and an area of 0.40 m2 is placed with the plane of its area parallel to a magnetic field of 0.75 T. The coil is flipped so its plane is perpendicular to the magnetic field in a time of 0.050 s. What is the magnitude of the average induced emf in the coil?

Answer 1

Answer:

90 V

Explanation:

Parameters given:

Number of turns, N = 15 turns

Area of coil, A = $0.4 m^2$

Magnetic field, B = 0.75 T

Time taken, t = 0.05 s

The average induced EMF in a coil due to the presence of a magnetic field is given as:

V = $\frac{-NBA}{t}$

$V = \frac{-15 * 0.75 * 0.4}{0.05}\\ \\\\V = -90 V$

The magnitude of the average induced EMF will be:

$|V| = |-90| V = 90 V$