Aflat coil of wire consisting of 20 turns, each with an area of 50 cm2, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from 2.0 t to 6.0 t in 2.0 s. if the coil has a total resistance of 0.40 ω, what is the magnitude of the induced current

i = 0.5 A

Explanation:

As we know that magnetic flux is given as

here we know that

N = number of turns

B = magnetic field

A = area of the loop

now we know that rate of change in magnetic flux will induce EMF in the coil

so we have

now plug in all values to find induced EMF

now by ohm's law we have

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.