When the coil rotates in the uniform magnetic field then the induced emf will be?

According to Faraday’s law of electromagnetic induction, when a single turn coil rotates in a uniform magnetic field, at uniform speed, the induced emf will be alternating.

When the coil is rotated in uniform magnetic field?

The correct option is a parallel to field. Explanation:i.e. angle between area vector and magnetic field is π/2 so angle between plane of the coil and magnetic field is zero So plane of the coil is parallel to the field.

In which position of the coil does the emf have the largest value?

The emf is maximum when the plane of the coil is parallel to the magnetic field as at this position the change in magnetic flux is the most and the emf is minimum when the plane of the coil normal or perpendicular to the magnetic field as at this position the change in magnetic flux is zero.

What is the maximum induced emf?

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. We observe a 90o phase shift between flux and induced emf.

Which are the factors that affect induced emf in electromagnetic induction?

The induced emf is directly proportional to the number of turns, magnetic field, area and the time in which the magnetic flux changes. Therefore, the magnitude of the induced emf depends on the change in magnetic flux and also on the time in which the magnetic flux changes.

When two coils are wound on each other the mutual induction between the coil is maximum?

mutual inductance
When the two coils are wound on each other, the coefficient of coupling is maximum and hence mutual inductance between the coil is maximum.

Which law gives the polarity of induced emf?

Faraday’s Law
When an emf is generated by a change in magnetic flux according to Faraday’s Law the polarity of the induced emf is given by Len’z Law.

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

When the plane of the armature is parallel to the lines of force of magnetic field, the rate of change of magnetic flux linked with it is maximum. Therefore, the e.m.f. induced in the armature in this orientation is maximum.

When the value of emf is maximum in an AC generator?

e.m.f is maximum when angle is 90°. Current from a generator: When agenerator is connected in a closed circuit, the induced e.m.f generates an electric current. As the loops rotates, the strength of the current changes as shown in graph.

Why is emf maximum when coil is horizontal?

The sides of the coil are moving perpendicularly to the magnetic field lines and will be “cutting” through the magnetic field lines at the greatest rate. Hence, the induced e.m.f. is the maximum at this position.

How do you find Max emf?

emf=2Bℓw2ωsinωt=(ℓw)Bωsinωt emf = 2 B ℓ w 2 ω sin ⁡ ω t = ( ℓ w ) B ω sin ⁡ . is the maximum (peak) emf. Note that the frequency of the oscillation is f = ω/2π, and the period is T = 1/f = 2π/ω.

How is emf induced in a coil?

An emf is induced in the coil when a bar magnet is pushed in and out of it. Emfs of opposite signs are produced by motion in opposite directions, and the emfs are also reversed by reversing poles. The same results are produced if the coil is moved rather than the magnet—it is the relative motion that is important.