- #1
Moxin
- 24
- 0
Ok, so here's the problem:
Induced EMF
A 5.80 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.770 T pointing up. During the course of 0.140 s, the field is changed to one of 0.240 T pointing down. What is the average induced emf in the coil?
and here's how i tackled it:
E=-N(change in magnetic flux/change in time)
change in magnetic flux = B2A - B1A = A(B2-B1) = 0.058^2pi(.770 - 0.140)
change in time = 0.140 s
N = 1
So I get..
E= 0.0100 V
Apparently that's wrong. Any suggestions ?
Induced EMF
A 5.80 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.770 T pointing up. During the course of 0.140 s, the field is changed to one of 0.240 T pointing down. What is the average induced emf in the coil?
and here's how i tackled it:
E=-N(change in magnetic flux/change in time)
change in magnetic flux = B2A - B1A = A(B2-B1) = 0.058^2pi(.770 - 0.140)
change in time = 0.140 s
N = 1
So I get..
E= 0.0100 V
Apparently that's wrong. Any suggestions ?