PHYSICS - Magnetism - Electric Motors

The video explains how electric motors work by demonstrating the interaction between wires carrying electric current and magnetic fields. It covers the motor effect, where wires are pushed due to magnetic field interactions, and how this linear motion is converted into circular motion using a spindle. The video also introduces the split ring commutator, which ensures consistent current direction in a spinning coil.

What rule is used to show the direction of the magnetic field around a wire carrying an electric current?

• Fleming's Left Hand Rule

• Maxwell's Corkscrew Rule

• Faraday's Law

• Ohm's Law

What happens to the magnetic fields above and below the wire in the motor effect?

• They both cancel each other out.

• They both reinforce each other.

• Above the wire, they reinforce; below, they cancel out.

• Above the wire, they cancel out; below, they reinforce.

What is the result of reversing the current in the wire?

• The wire experiences a rotational force.

• The wire experiences no force.

• The wire experiences a force in the same direction.

• The wire experiences a force in the opposite direction.

How is circular motion achieved in an electric motor?

• By reversing the current continuously.

• By linking wires and using a spindle for rotation.

• By using a single wire in a magnetic field.

• By using a stronger magnetic field.

What component ensures the current flows in the same direction in a spinning coil?

• A diode

• A transformer

• A capacitor

• A split ring commutator