P=I*E, the power being dissipated by the resistor is a product of the current and the applied voltage

Resistors in series:

R = R1 + R2 + R3-- 

Resistors in parallel:

1/R=(1/R1)+(1/R2)+(1/R3)--- 

How to read value of resistors: http://www.abcofelectronics.com/resistors.htm

The resistance of a conductor at a temperature, t, is given by the equation:

Rt = R0(1 + a t + b t2 + y t3 ...) where a,b,y  are constants and R0 is the

resistance at 0°C. Note that b & y are very small hence they can be neglected.

Therefore above equation simplifies to .

Rt = R0(1 + a t)

where a = temperature coefficient of resistance

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