Electrodynamics

Question 1

Explain function of cell

Answer 1

Provide the DC

Question 2

Explain function of Coil/Armature

Answer 2

Carries the current through the magnetic field

Question 3

(Carbon) Brush

Answer 3

Conducts curent to and from the split ring commutator whilst allowing the commutator to turn

Question 4

Explain function of commutator

Answer 4

Keeps the turning force of the motor in the same direction by alternation the current direction in the moving coil

Question 5

Power output of a motor can be improved by:

Answer 5

1. Using stronger magnets
2. Increasing the current through the wire
3. Increasing the number of turns (of wire/coil) on the armature