Question

Vani’s hair dryer has a resistance of 50 Ω when it is first turned on, How much current does the hair dryer draw from the 230 V – line in Vani’s house?

Answer 1

resistance is 50 ohms

potential difference is 230 volts

I = V / R
I = 230 /50
I = 4.6 amperes


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Answer 2

The answer would be 4.6 Ampere.

This is because as temperature increases, the resistance of the metallic conductor also increases manifold.

Hence, I= V/R. So we get the calculation, that 230/50= 4.6 Ampere. When it runs for a long time, its fuse gets affected and the heat flow is interrupted.