Question

I have a circuit with various resistors both in series and parallel. However, if a power of over 2.00W is dissipated in one of these resistors, that resistor will fail.

How can I work out the maximum voltage of the battery that can be used without any of the resistors failing.

All I am given is the resistances of the resistors in the circuit and power rating 2.00 W.

Answer 1

We can use the resistors in such a way that

$m$ resistors can be arranged in series and $n$ rows of such $m$ resisters connected in series can be used so that total no. of resistors will be$\ mn$ .

No. of rows can be adjusted in such a way so that current in any row do not exceed the maximum safe current.