An electric lamp of 100 , a toaster of resistance 50 , and a water filter of resistance 500 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?

Question

Philoid · Accepted Answer

The combined resistance R of three resistors (or electrical devices) R₁ R₂ and R₃, connected in parallel is given by the formula:

Here, Resistance of electric lamp, R₁ = 100

Resistance of toaster, R₂ = 50

Resistance of water filter, R 3 = 500

Putting these values of R₁ R₂ and R₃ in the above formula, we get:

Thus, the resistance of electric iron will also be 31.25.

Now, Potential difference, V= 220 V

Current, I =?

Thus, the current passing through the electric iron is 7.04 amperes.

An electric lamp of 100, a toaster of resistance 50 , and a water filter of resistance 500 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?