The Generator Effect

Question 1

What is the generator effect?

Answer 1

The induction of a potential difference (and current if it is a complete circuit) in the wire which is moving relative to a magnetic field or experiencing a change in magnetic field
Also known as electromagnetic induction

Question 2

Changes in the size of the induced potential difference

Answer 2

Increasing speed of the movement
Increasing the strength of the magnetic field

Question 3

Generators

Answer 3

Use the generator effect to induce a current
They rotate the coil in the magnetic field using a split ring commutator (meaning they dint change the direction of the current)

Question 4

Microphones

Answer 4

Sound waves hit the flexible diaphragm attached to a coil of wire, which causes the coil of wire to move in the magnetic field which generates a current
The movement of the coil depends on the properties of the sound wave (louder sounds makes the diaphragm vibrate more)
The microphone converts the pressure variations into current