The voltage V across a circuit is given by Ohm's law V = IR where I is the current (in amps) flowing through the circuit and R is the resistance (in ohms). If we place two circuits, with resistance R1 and R2, in parallel, then their combined resistance is given by 1 1. 1 %3D R R1 R2 Suppose the voltage drop on the resistance is 4 volts and increases at 10-2 volts/sec, R1 is 7 ohms and decreases at 0.2 ohm/sec, and R2 is 3 ohms and increases at 0.1 ohm/sec. Calculate the rate at which the current is changing. I R1 R2 1 1 R R1 R2