Question

in an electric bell, the electiric current stop again and again? give reason.

Answer 1

ANSWER
.........................
In window motors, there is a 'mica conductor

' in line with one of the commutator brushes

and the wiring leading to the brush.

This conductor loses its conductivity over

a period of time and slows the operation

of the motor, typically the

window will go down but not back up, it's really a built in failure of the motor

(inducing the purchase of an expensive new motor).
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