# What must change for electromagnetic induction to occur?

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What must change in order for electromagnetic induction to occur in a wire coil? The magnetic field through the coil must change. … The induced voltage in a coil is proportional to the number of loops, to the area of the loops, and to the rate of change of the magnetic field through the loops.

## What does electromagnetic induction depend on?

The amount of voltage induced depends on the rate of change of the magnetic field flux and the number of turns of wire (if coiled) exposed to the change in flux. Faraday’s equation for induced voltage: e = N(dΦ/dt)

## What creates electromagnetic induction?

Electromagnetic induction occurs when a circuit with an alternating current flowing through it generates current in another circuit simply by being placed nearby. … Fluctuating magnetic fields cause currents to flow in conductors placed within them, which is also known as Faraday’s Law.

## What factors determine the amount of induction?

The factors that determine how much voltage is induced due to electromagnetic induction in a circuit are;

• The number of turns in the coil around the core.
• The rate at which the magnetic field changes.
• The strength or size of the magnetic field.
• The speed at which the conductor passes through the field.

## How does a changing magnetic field produce an electric current?

If a coil of wire is placed in a changing magnetic field, a current will be induced in the wire. This current flows because something is producing an electric field that forces the charges around the wire. (It cannot be the magnetic force since the charges are not initially moving).

## Which changes will cause an increase in the magnetic field of a solenoid?

The small magnetic fields caused by the current in each turn of the coil add together to make a stronger overall magnetic field. The strength of the magnetic field around a solenoid can be increased by: increasing the number of turns on the coil. increasing the current.

## Which are the factors that affect the 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.

## What is electromagnetic induction State Faraday’s laws of electromagnetic induction?

The Faraday’s law of electromagnetic induction says that. the E.M.F. induced in a coil ‘e’ =− (rate of change of magnetic flux linkage) where, the Flux linkage = number of turns ‘N’ times magnetic field ‘B’ × area ‘A’ ×cosθ

## What is electromagnetic induction state and explain Faraday’s law of electromagnetic induction?

Faraday’s first law of electromagnetic induction states that “Whenever a conductor is placed in a varying magnetic field, an electromotive force is induced. Likewise, if the conductor circuit is closed, a current is induced, which is called induced current.”

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## What is produced by a changing magnetic field?

It is the change in magnetic field that creates the current. More basic than the current that flows is the electromotive force (EMF) that causes it. The current is a result of an EMF induced by a changing magnetic field, whether or not there is a path for current to flow.

## What does changing electric field produce?

Ampere’s Law roughly states that ‘a changing electric field creates a magnetic field’. Thus, this law can be applied to generate a magnetic field and run an electric motor.