Question

A wire in the form of a circular loop of radius 10 cm lies in a plane normal to a magnetic field of 100 T. If this wire is pulled to take a square shape in the same plane in 0.1 s, find the average induced emf in the loop.

Answer 1

Answer:

16.4 is correct answer

Explanation:

Mark the answer brainliests please

Answer 2

Given: Radius of wire = 10cm

Magnetic field = 100T

Time = 0.1s

To find: Average induced emf in loop

Solution:

2πR = 4L

Therefore,

L = πR/2 = π × 10/2 = 5πcm

Δs = Si - Sf

= πr² - L²

= π ( 0.1)² - ( 5π)² × 10`4

= 0.0067

Now,

e = ΔФ/Δt = B. Δs/Δt = 100 × 0.0067/0.1

= 6.7v

Answer : The average induced emf in the loop is 6.7v