# Calculus

posted by
**kieran**
.

By Kirchoffs voltage law the sum of the voltage in the circuit. Consider the circuit with variable resistor R.

5V 10ohms

R

A. find a relationship between I and R in the circuit using E=I R and kirchoffs voltage law.

B. the power to a resistor is given by I^2R watts write P as a function of R.

C. Find the setting of the variable resistor R so that it takes max power