Understanding Fleming's Left Hand Rule and the Motor Effect

The video tutorial explains the interaction between a conducting wire and an external magnetic field, focusing on the motor effect. It covers how magnetic fields are produced by permanent magnets and current-carrying wires, and how these fields interact to create forces. The tutorial introduces Fleming's left hand rule to determine the direction of force on a conductor. It also discusses factors affecting the force, such as current size, magnetic field strength, and the angle between current and field. The video concludes with a summary of key concepts.

What is the motor effect?

• The creation of a magnetic field by a permanent magnet

• The interaction between two permanent magnets

• The flow of current in a wire

• The force experienced by a current-carrying wire in a magnetic field

How do the magnetic field lines flow between the poles of a magnet?

• From South Pole to North Pole

• From North Pole to South Pole

• In a circular motion around the magnet

• They do not flow

What does Fleming's left-hand rule help determine?

• The direction of the current

• The strength of the magnetic field

• The direction of the magnetic field

• The direction of the force on a conductor

In Fleming's left-hand rule, what does the first finger represent?

• The strength of the magnetic field

• The direction of the magnetic field

• The direction of the force

• The direction of the current

What happens to the force on a wire if the current is increased?

• The force decreases

• The force remains the same

• The force increases

• The force becomes zero

How does the angle between the current and magnetic field affect the force on a conductor?

• The force is maximum when they are parallel

• The angle does not affect the force

• The force is maximum when they are perpendicular

• The force is zero when they are perpendicular

What is the effect of increasing the magnetic field strength on the force experienced by a conductor?

• The force becomes zero

• The force remains unchanged

• The force decreases

• The force increases