What happens to the direction of current in the coil after every half rotation?

Answer : The split ring reverses the direction of current in the armature coil after every half rotation due to change in orientation of the magnetic field, i.e, it acts as a commutator.

What is the direction of the rotation of the coil?

In the diagram above, based on Fleming’s left hand rule, the right side of coil experiences an induced force in downward direction while the left side of coil experiences an induced force in the upward direction. This creates a clockwise moment about the pivot (axis of the coil) and coil rotates in clockwise direction.

In which direction will the coil begin to rotate when the current is passed through the coil in the direction ABCD by connecting a battery at the ends A and D of the coil?

(a)The coil begins to rotate in anticlockwise direction.

In which direction will the coil rotate when a current is passed through the coil in the direction ABCD?

anti-clockwise direction
Whereas the force on the side CD of the coil is in the upward direction. As a result, coil ABCD rotates in anti-clockwise direction.

Which of the following alters the direction of the current in the coil every half rotation in a DC motor?

A steady current flows out of the plane of the paper in a long vertical wire. Which figure shows the direction and pattern of the magnetic field around the wire?

How is current changed in electric motor after every half rotation of the coil of wire what is the device called as?

Ans. In an electric motor split ring acts as a commutator. Split ring is connected to the ends of the coil and the direction of current flowing in motor coil reverses after every half turn.

Does the coil continue to rotate when the current is off?

When you give the coil a spin, since one side of the wire is insulated, you break the circuit briefly, so the coil continues to rotate using its momentum. When the circuit is complete again, the magnetic field once again repels the coil, so it keeps spinning. The motor can continue to spin until the battery is dead!

When there is a current in the coil the coil rotates continuously explain why?

The coil of wire is mounted in the gap between the two magnets. The split rings make electrical contact with the coil and reverse the current every half turn. When an electric current flows through the coil, a force is exerted on the coil, causing it to spin.

How can you induce current in a coil?

Answer:

1. If a coil is moved rapidly between the two poles of a horseshoe magnet, then an electric current is induced in the coil.
2. If a magnet is moved relative to a coil, an electric current is induced.
3. By keeping it stationary and rotating a magnet inside it, the current in the coil can be induced.

Why is a commutator necessary for the continuous rotation of the coil?

As the armature rotates, the commutator reverses the current in each coil as it moves between the field poles. This is necessary if the forces acting on the coil are to remain acting in the same direction and so continue the rotation.

Which part of electric motor changes the direction of current in the coil *?

transformer
The transformer, dc changes the direction of current in the coil of the motor.

Which device produces the electric current?

generator
generator.

Which part of the DC motor reverses the direction of current?

The part of the DC motor that reverses the direction of the current though the coil is the parts of the commutator that touch the brushes.

What happens to the direction of induced current during half revolution?

The direction of the induced current changes once in each When a rectangular coil is rotated in magnetic field, the direction of the induced current changes once in half revolution. As a result, the direction of the current in the coil remains the same. 1. Name two safety measures commonly used in electric circuits and appliances.

What happens if the direction of current does not change?

If the direction of the current did not change, the coil would not keep rotating in the same direction continuously. The split-ring commutator connects the coil to the power supply and means that each time the coil rotates half a turn, the current in the coil reverses direction.

How does the coil of an electric motor rotate?

The magnetic field in the coil is at right angles to the magnetic field of the permanent magnet. Thus, a magnetic couple acts, which rotates the coil. When current is passed through the coil in direction ABCD by connecting a battery at the ends A and D of the coil, the rectangular coil ABCD will rotate about its axis.