A 14 cm square loop with 66coils is in a magnetic field of strength 8.55 T. Init

Question

A 14 cm square loop with 66coils is in a magnetic field of strength 8.55 T. Initially the plane of the loop is perpendicular to the magnetic field. What is the initial flux through the loop? The loop is then rotated 90 degrees so that the plane of the loop is now parallel to the magnetic field. If this takes 0.273 seconds what will the average induced emf be A 14 cm square loop with 66coils is in a magnetic field of strength 8.55 T. Initially the plane of the loop is perpendicular to the magnetic field. What is the initial flux through the loop? The loop is then rotated 90 degrees so that the plane of the loop is now parallel to the magnetic field. If this takes 0.273 seconds what will the average induced emf be What is the initial flux through the loop? The loop is then rotated 90 degrees so that the plane of the loop is now parallel to the magnetic field. If this takes 0.273 seconds what will the average induced emf be

Explanation / Answer

a) flux = B.A

flux = BAcostheta

here theta = 0

flux = 0.14^2*8.55 = 0.167 Wb

b) emf = Nd(flux)/dt

final flux is zero because plane is parallel to the field

emf = 66*0.167/0.273

emf = 40.37 V

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