Ohm's law

Definition and examples

Ohm's law is the electric potential difference between two points on a circuit is equivalent to the product of the current between those two points and the total resistance of all electrical devices present between those two points. The formula is current=voltage/resistance.
Examples
1)To find the current 
2)to find the voltage 
3)to find the resistance 

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Relating concepts to house fires

one way ohm's law help is that many people who build houses see if there is a lot of resistance and measure the current to see if there is a lot of voltage there and  then put  the right amount of a  certain area. 

how this helps reduce and prevent house fires

If you about this you could call the electrical to see if the pipes are right so that your house will be protected against electrical pipes leakage.Also you can find ohms law to see if there is to much current, if there is to much current then it will cause to much thermal energy and  cause a fire. In an experiment I did I had seen a series circuit use to much current and it caused sparks when I put a machine that measures voltage near it.