PHYSICS - Magnetism - Motor Effect - Fleming's left hand rule

The video tutorial explains Fleming's left hand rule, which helps in understanding the relationship between current, magnetic fields, and force direction. It introduces the motor effect, where a current-carrying wire in a magnetic field experiences a force. The tutorial demonstrates how to use the left hand to determine the direction of force, with the thumb, first finger, and second finger representing movement, magnetic field, and current, respectively. Practical examples are provided to reinforce the concept.

What is the motor effect?

• A phenomenon where a wire carrying a current creates a magnetic field that interacts with other fields, causing a force.

• A method to calculate the speed of a motor.

• A rule to determine the direction of current in a circuit.

• A technique to measure the strength of a magnetic field.

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

• The strength of the magnetic field.

• The direction of the force or movement.

• The direction of the magnetic field.

• The direction of the electric current.

Which finger in Fleming's left hand rule indicates the direction of the current?

• Second finger

• Third finger

• First finger

• Thumb

How should you adjust your hand when the direction of the current changes?

• Rotate your hand to align with the new current direction.

• Keep your hand in the same position.

• Switch to using your right hand.

• Point your thumb in the opposite direction.

What does the thumb represent in Fleming's left hand rule?

• The direction of the magnetic field.

• The direction of the electric current.

• The direction of the force or movement.

• The strength of the current.