Motors

Question 1

What happens if conductor is parallel to magnetic field

Answer 1

Won’t experience a force

Question 2

Describe the motor effect

Answer 2

When a conductor such as a wire is carrying a current it experiences a force in a magnetic field

Question 3

How does a loudspeaker work

Answer 3

• cone with a coil of wire wrapped around one end
• coil of wire connected to an alternating current electrical supply
• permanent magnet goes inside coil of wire
• as current passes through coil it generates magnetic field
• magnetic fields either attract or repel
• produces resultant force which causes cone to move
  = generate sound waves

Question 4

Effect of changing frequency of AC supply

Answer 4

Can change frequency that the cone vibrates
Higher frequency produces higher pitch sound

Question 5

Effect of increasing size of current

Answer 5

Increase amplitude of the vibration
= increases volume of sound