GCSE Physics - Motor Effect #79

The video tutorial explains the motor effect, where a current-carrying wire in a magnetic field experiences a force. It covers how to determine the direction and strength of this force using Fleming's left hand rule and the equation F = BIL. The tutorial also discusses scenarios involving horseshoe magnets and provides a practical example of calculating force.

What happens to a current-carrying wire placed parallel to a magnetic field?

• It experiences maximum force.

• It experiences no force.

• It experiences a slight force.

• It experiences a force in the opposite direction.

Which finger represents the direction of the magnetic field in Fleming's left hand rule?

• Third finger

• Second finger

• First finger

• Thumb

In Fleming's left hand rule, if the magnetic field is pointing downwards and the current is towards you, which direction will the force be?

• Upwards

• Left

• Downwards

• Right

What does the 'B' in the formula F = BIL stand for?

• Force

• Length of the wire

• Current

• Magnetic flux density

If a wire with a current of 5 amps is placed in a magnetic field of 0.4 teslas at 90 degrees, what is the force experienced by a 0.1-meter wire?

• 0.4 newtons

• 0.2 newtons

• 0.3 newtons

• 0.1 newtons