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.
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