# At the equator a 1000 turn coil with a cross sectional area of 300 cm2 and a resistance of 15 #Omega# is aligned with its plane perpendicular to the earth’s magnetic field of 7*10^-5 T . If the coil is flipped over how much charge flows through it?

Lenz's law also tells us that the rate at which the magnetic flux associated with the coil shifts and opposes it is known as the induced emf in the coil.

By rewriting (1) using (2) and (3) as support, we obtain

By applying (4), we obtain

Putting specified values into SI units yields

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When the coil is aligned with its plane perpendicular to the Earth's magnetic field, no induced current is produced because the angle between the magnetic field and the normal to the coil's plane is 90 degrees.

When the coil is flipped over, the angle between the magnetic field and the normal to the coil's plane is still 90 degrees, so the change in flux is zero. Therefore, according to Faraday's law of electromagnetic induction, no induced electromotive force (emf) is generated, and thus, no charge flows through the coil.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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