Worn or frayed wire to starter?
A circuit breaker must be reset to ON after a short circuit but does not need to be replaced. It depends on the type of CB. A fuse is also a circuit breaker and it needs to be replaced after a short circuit. Relayed circuit breakers have to be "picked up" after a dropout and need not be replaced as such.
why would a circuit not work when a wire is replaced with a cotton string
No.
The condition that will result anytime the human body becomes part of an electrical circuit will be an electrical shock. As the neutral side of a load is grounded all a person has to do to become part of the circuit is touch the "hot" feeder side of the circuit and any grounded metallic object that forms part of that circuit.
Have the circuit breaker replaced.
"The series circuit can be replaced, however it is not an easy task and it is best left up to professionals in computer repair unless you have extensive experience with computers."
Anytime you ask electricity to do anything for you. Turn on light bulbs, start a car, run ann engine, watch TV. Anytime electrical power is used.
Hopefully it's a fuse.
no rubber stops the flow of electricity
no rubber stops the flow of electricity
Assizes
Resettable circuit breakers.