How a voltage is induced in secondary of a transformer when current flows through primary?

When current is reduced, the magnetic field strength reduces. When the magnetic lines of flux flow around the core, they pass through the turns of the secondary winding, causing a voltage to be induced into the secondary coil.

Why is an alternating EMF induced in the secondary coil of a transformer when the primary coil is connected to an alternating voltage supply?

We can make the magnetic field carry on changing by using an alternating current in the primary coil. This produces a magnetic field in the secondary coil. Since the current is alternating, the magnetic field also alternates back and forth. This changing magnetic field induces an alternating EMF in the secondary coil.

How is induced current in a secondary coil related to primary coil?

The primary coil induces the magnetic field which is under the change once the current changes, the iron core later increases the “strength of the magnetic field”. Hence in this way induced current in a secondary coil related to current in a primary coil.

When magnetic induction occurs in a transformer what is induced from one coil to another coil?

The core is often shaped as a square loop with primary and secondary coils wound on opposite sides. The construction of a transformer allows the magnetic flux generated by a current changing in one coil to induce a current in the neighboring coil.

How can the induced emf in the secondary coil be increased?

Increasing the speed of the relative motion between the coil and the magnet – If the same coil of wire passed through the same magnetic field but its speed or velocity is increased, the wire will cut the lines of flux at a faster rate so more induced emf would be produced.

What does the secondary coil do?

The secondary winding is the coil that delivers the energy at the transformed or changed voltage to the load. Usually, these two coils are subdivided into several coils in order to reduce the creation of flux.

How do Transformers affect current?

In other words, power equals voltage times current. A transformer transfers power from the primary coil to the secondary coil. Since the power must stay the same, if the voltage increases, the current must decrease. Likewise, if the voltage decreases, the current must increase.

What is the function of the secondary coil in a transformer?

The primary coil brings voltage and current into the device. The variations create a changing flux in the core. That changing magnetic flux induces a voltage and current in the secondary coil, in proportion to the primary/secondary turns ratio.

What happens when alternating voltage is applied to the primary coil?

When an alternating voltage ( VP ) is applied to the primary coil, current flows through the coil which in turn sets up a magnetic field around itself, called mutual inductance, by this current flow according to Faraday’s Law of electromagnetic induction.

What is the difference between the primary and secondary coil windings?

Both the primary and secondary coil windings are wrapped around a common soft iron core made of individual laminations to reduce eddy current and power losses. The primary winding of the transformer is connected to the AC power source which must be sinusoidal in nature, while the secondary winding supplies electrical power to the load.

When does a coil experience an induced current when magnetic field varies?

A coil experiences an induced current when the magnetic field passing through it varies. (a) When the magnet moves toward the coil the current is in one direction. (b) No current is induced while the magnet is held still.