Exercise 29.2 In a physics laboratory experiment, a coil with 210 turns enclosin
ID: 1396551 • Letter: E
Question
Exercise 29.2 In a physics laboratory experiment, a coil with 210 turns enclosing an area of 13.3 cm s rotated in a time interval of 3.80x10 2 s from a position its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to the field. The earth's magnetic field at the lab location is 6.0x10-5 T Part A What is the total magnetic flux through the coil before it is rotated? Express your answer using two significant figures. AE Wb Submit My Answers Give U Part B What is the total magnetic flux through the coil after it is rotated? Express your answer using two significant figures. AE Wb Submit My Answers Give U Part C What is the average emfinduced in the coil? Express your answer using two significant figures.Explanation / Answer
given,
no. of turns of the coil N=210
area of the coil A=13.3cm^2 =13.3*10^-4 m^2
earth's magnetic field B=6*10^-5 T
A)
before rotating, total magnetic flux =N(B.A)
total magnetic flux =N(B*A*cos(theta))
here, theta is the angle between normal of the plane to magnetic field
thtea=0 degrees
now,
total magnetic flux =N(B*A*cos(0))
=210(6*10^-5*13.3*10^-4*1)
=1.67*10^-5 Wb
B)
after rotating, total magnetic flux =N(B.A)
total magnetic flux =N(B*A*cos(theta))
thtea=90 degrees
now,
total magnetic flux =N(B*A*cos(90))=0
total magnetic flux is zero
c)
emf=flux/time taken
=1.67*10^-5/3.8*10^-2
=0.441*10^-3
=4.41*10^-4 v
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