# What are the factors that affect the magnitude of an induced emf in a coil of wire?

## What are the factors that affect the magnitude of an induced emf in a coil of wire?

What four factors affect the magnitude of the induced emf in a…

• The induced e.m.f. is proportional to the number of turns in a coil.
• The speed at which the conductor moves through the magnetic field.
• The length of the conductor.
• The rate at which the conductor cuts the magnetic lines of force.

### What did Faraday conclude from his experiment on electromagnetic induction?

Conclusion: From this experiment, Faraday concluded that whenever there is relative motion between a conductor and a magnetic field, the flux linkage with a coil changes and this change in flux induces a voltage across a coil. These laws are called Faraday’s laws of electromagnetic induction.

What are the factors affecting the induced emf?

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.

What factors can cause an induced current in a wire loop through which a magnetic field passes?

Induced current can be created by changing the strength of the magnetic field only. Induced current can be created by changing the strength of the magnetic field, changing the size of the wire loop, or changing the orientation of the wire loop.

## What factors that affects the magnitude of the induced EMF and the magnitude and direction of the induced current based your answer in Faraday’s Law?

The number of turns of the coil:As the number of turns increases, the magnitude of the induced current increases.

• The speed of the relative motion of the conductor and the magnetic field: As the speed of the relative motion of the magnet increases, the magnitude of the induced current increases.
• ### How does speed affect EMF?

Back EMF is directly related to speed, so when the speed decreases, so does the induced back EMF. From the equation above, we can see that if there is less back EMF, the voltage (and, therefore, current) across the motor will increase.

What was Faraday experiment?

When Michael Faraday made his discovery of electromagnetic induction in 1831, he hypothesized that a changing magnetic field is necessary to induce a current in a nearby circuit. To test his hypothesis he made a coil by wrapping a paper cylinder with wire.

What is the result of Faraday experiment?

The conclusion of the Faraday and Henry experiment was that there was relative motion between the coil and magnet resulting in the generation of current in the coil.

## What is EMF in electromagnetic induction?

Electromagnetic induction is the production of an electromotive force (EMF) being created as a result of relative motion between a magnetic field and a conductor.

### When a strong magnet is used the induced emf increases?

3). Increasing the strength of the magnetic field – If the same coil of wire is moved at the same speed through a stronger magnetic field, there will be more emf produced because there are more lines of force to cut.

How can induced current be increased?

The magnitude of the induced current can be increased by: Taking the conductor in the form of a coil of many turns of insulated wire. Increasing the strength of the magnetic field used. Increasing the rate of change of magnetic flux associated with the coil.

What is Faraday first law of electromagnetic induction?

Faraday’s first law of electromagnetic induction states that whenever the flux of magnetic field through the area bounded by a closed loop changes, an emf is produced in the loop. In any case, as long as the flux keeps changing, the emf is present. And that produced emf drives an electric current through the loop.

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