Question: Why Is The EMF Zero When Maximum Number Of Magnetic Lines Of Force Pass Through The Coil?

What is Lenz’s Law equation?

Lenz’s law formula is given by- Emf=-N\left ( \frac{\Delta \phi }{\Delta t} \right ) Where, Emf is the induced voltage (also known as electromotive force).

N is the number of loops.

\Delta \phi Change in magnetic flux..

Why is the EMF zero when the coil is passing through the center of the magnetic plates?

Why is the emf zero when the coil is passing through the center of the magnetic plates? The emf is zero because the values of the left and right side of the pendulum cancel out and are equal and opposite in sign. 3.

Why is EMF zero when magnetic flux is maximum?

An emf is induced in the coil because of this changing magnetic flux. … By Faraday’s law, the magnitude of the induced emf is equal to the rate of change of magnetic flux, so its maximum values occurs when the flux curve has its greatest slope. The induced emf goes through zero when the flux curve has zero slope.

Why the induced emf is at maximum when the coil is parallel to the magnetic field?

When the coil is upright there is no change in magnetic flux (i.e emf=0) because the coil isn’t ‘cutting across’ the field lines. The induced emf is zero when the coils are perpendicular to the field lines and maximum when they’re parallel. Remember, the induced emf is the rate of change in magnetic flux linkage.

When you drop a magnet in a solenoid why there is a section of near zero induced emf in the middle?

At some point, the bar reaches the middle of the coil. At this point, the amount of flux added to the top half of the coil by a small motion of the magnet is equal to the amount of flux removed from the bottom half. Therefore, at this point the EMF is zero.

If emf is induced in a coil, N is its number of turns. The minus sign means that the emf creates a current I and magnetic field B that oppose the change in flux ΔΦ—this opposition is known as Lenz’s law.

How will you induce an EMF by changing the area enclosed by the coil?

Emf induced by changing the area enclosed by the coil A uniform magnetic field ‘B’ acts perpendicular to the plane of the conductor. The closed area of the conductor is L1QRM1. When L1M1 is moved through a distance dx in time dt, the new area is L2QRM2.

Why is the sign of the EMF of the second peak opposite to the sign of the first peak?

Faraday’s law predicts that the direction of the induced voltage is dependent on the nature of the change in magnetic field. … The second peak (outgoing peak) is higher than the incoming peak because the magnet is moving slower during the second ‘half of the fall, and induces a smaller voltage.