Understanding the Motor Effect and its Practical Application

The video tutorial explains the motor effects, where a conductor and a magnet exert force on each other. It covers how to calculate the magnitude of this force using the formula F = BIL, where B is the magnetic flux density, I is the current, and L is the length of the conductor. The direction of the force is determined using Fleming's left hand rule. An example is provided to illustrate the calculation of force and its direction. Finally, the motor effect is applied to a simple electric motor, demonstrating how forces cause the coil to spin.

What is the formula used to calculate the force on a conductor in a magnetic field?

• F = bIL

• F = qE

• F = mgh

• F = ma

According to Fleming's left-hand rule, what does the thumb represent?

• Direction of the magnetic field

• Direction of the current

• Direction of the force

• Direction of the velocity

In the example provided, what is the calculated force on the wire?

• 1.8 newtons

• 0.0018 newtons

• 0.018 newtons

• 0.18 newtons

What is the direction of the force on the wire in the example?

• Downwards

• Upwards

• To the left

• To the right

In a simple electric motor, what causes the coil to spin?

• The coil is mounted on an axle

• The current flows in the same direction on both sides of the coil

• The forces on opposite sides of the coil are in opposite directions

• The magnetic field is uniform