Question

Just part B and C

In-class problem A coil consists of 200 turns of wire. Each turn is a square of side d = 18 cm, and a uniform magnetic field directed perpendicular to the plane of the coil is turned on. The figure shows the behavior of the magnitude of the magnetic field with time. From 1=0 to 1=0.80 s, the field changes linearly from 0 to 0.50 T. After 1 = 0.80 s, the magnitude of the field decays in time according to the expression B = B ear, where a is some constant and Boy = 0.50 T. (A) What is the magnitude of the induced emf in the coil between 1 = 0 and 1 = 0.80 s? (B) (B) What is the magnitude of the induced emf in the coil after 1 = 0.80 s? (C) What if you were asked to find the magnitude of the induced current in the coil while the field is changing during the first 0.80 s? 0.803

Answer 1

(4 Eind = NCA) = 200x (048%) 0.8 Eind=4.05 Volts . (B) After t=0.85 We have ) {=-N (dy) =-N.A. dB --200x 0.18 × (-ax Bmaxe dt = Eina = 3:24 a é at 2.05 (6) Zin Ampere Induced current - Induced 1- I= {ind = 4:05 Ampere corrent where R is the resistance of the coil.