Question

in an electric motor, springs are fitted on the back of the brushes, because:
it collects the current from the commutators
Brushes are made of carbon
Brushes are held against the commutators by the springs
Springs act as solenoids to create magnetic field when current passes through them

Answer 1

Answer:

Brushes are held against the commutators by the springs.

Explanation:

Brushes are made of Carbon which is resistant in nature so that sparking reduces and there by losses. So to hold the brushes firmly to the commutators springs are placed which allows to make good surface contact with the cummutators.

Answer 2

In an electric motors springs are fitted on the back of the brushes because brushes are held against the commutators by the springs.

• A general electric motor has different types of important parts which have different functions to perform.
• Similarly, the brush and the commutators, are two most important parts of any electric motor.
• The physical contact between the brush and the commutators, are extremely important for continuous working of the electric motor.
• Now, the spring is used (in compressed form) at the back of the brush because brushes are held against the commutators by the springs. The compressed spring snugly pushes the brush towards the commutator and thus a good physical contact for hassle free electrical flow, takes place.