I read that if you create a short-circuit, this produces heat and can cause a fire or damage an electronic component. The solution is to use a resistor.
The heat generated by electricity is proportional with the amount of electricity passing through a conductor in a period of time
[Source: Make: Electronics Second Edition]
And I read in this question(What does a resistor do?), that
If I switch the power source from 5V to 9V, will I still measure the same numbers after a resistance ?
And got this answer :
The increased electromotive force will allow more charges to flow per unit time, i.e. the current will increase.
If I connect a resistor to a high voltage source, a lot of current will pass through it and the heat will increase.
What will happen ? Does the resistor break and allow more and more current to pass? Could it start a fire ?