An electric lamp of 100Omega , a toaster of resistance 50Omega, and a water filter of resistance 500Omega are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances and what is the current through it?

An electric lamp of 100Omega , a toaster of resistance 50Omega, and a

1.	An electric lamp of 100Omega , a toaster of resistance 50Omega, and a water filter of resistance 500Omega are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances and what is the current through it?
Answer» SOLUTION :`1/R=1/100+1/50+1/500=(5+10+1)/500=16/500` `R=500//16=31.25Omega` `I=V//R=220//32.25=7.04A`.