Lesson 3: The Motor Effect

Question 1

What is the motor effect?

Answer 1

• When a conductor carrying a current is placed in a magnetic field the
  magnet producing the field and the conductor exert a force on each
  other.

Question 2

How do you work out the force exerted on a conducting wire (carrying current) in a magnetic field?

Answer 2

force = magnetic flux density x current x length.
F= BIL
F)*&$ bill :)

Question 3

What is the “magnetic flux density?”

Answer 3

• Magnetic flux density is a measure of the strength of the magnetic field (that the wire is put in.)

Question 4

What specific conductor does the F = BIL equation apply to?

Answer 4

• The F= BIL applies to conductors that are carrying current and are at right angles to a magnetic field.

Question 5

What 3 factors affect the size of the force on a conductor (carrying current) in a magnetic field?

Answer 5

1.) Magnetic flux density (magnetic field strength of magnet.)
2.) Size of current flowing through the conductor.
3.) Length of the conductor in the magnetic field.

Question 6

What is magnetic flux density measured in?

Answer 6

• tesla (T)

Question 7

In what case will a conductor carrying a current and in a magnetic field NOT experience a force?

Answer 7

• The conductor will not experience a force if the conductor is parallel to the magnetic field (going in the same direction as the magnetic field.)