The voltage,V,(in volts)across a circuit is given by Ohm's law:V=IR,where I is the current and R is the resistance(in ohms)If we place three circuits,with resistance R1,R2,R3in parallel,then their combined resistance,R,is given by R/1=R1/1+R2/1+R3/1.suppose that R1 is 1 ohm and increasing a 0.1 ohm/sec and R2is 2 ohms and decreasing at o.2 ohms/sec and R3 is 3 ohms and decreasing at o.3 ohms/sec and the current is 4 amps and increasing at 0.4amps/sec.Find the rate at which the voltage is changing over time.
