00:01
Well, first we know the charge can be equal to the current times the time.
00:05
And we know current can be equal to induce emf divided by the resistance.
00:10
And we know induce emf is equal to the area of the loop, times the changing magnetic view over time.
00:16
And the resistance is equal to resistivity of the copper, times the length of the loop over the area of the wire.
00:27
Okay? so therefore, we have induce emf over the resistance is equal to area of the loop, times the area of the wire, and then times the changing magnetic field over changing time, times the resistivity, times the length of the loop.
00:50
So, which means that the current is equal to a loop, times a wire, times delta b over delta t, t, row l.
01:00
And then we have the charge is equal to current times time, which eventually will have area of loop times area of wire times the wire, times the changing magnetic field over the resistivity times the length of loop.
01:20
Because here delta t, oh sorry, because here the delta t and delta t cancel out.
01:32
Then we know the area of loop is equal to pi times the radius of a loop, which is equal to pi times the diameter divided by two.
01:41
And into the power two, which we have four on the bottom and pi d1 square above it.
01:47
So which is pi d1 square over four is the area of loop.
01:52
And the area of a wire is equal to pi tens the radius of the wire square, which is equal to pi times the one half of the diameter of the wire square.
02:02
Then we have pi d2 square over four.
02:04
And we know the lens of the loop is just simply equal to pi times the diameter of the loop, which is pi d1...