ICSE − Q & A

I have a question that my friend asked me:
Consider two heating devices A and B which use a wire of high resistance to produce heating effect.
Let the Resistance of A be x and that of B be 2x
So B should produce more heat.(as the resistance of wire is double)
But V = IR(so I is inversely proportional to R)
So let the current in A be y, so the current in B should be y/2
According to H = I^2RT
Heat produced is directly proprtional to the SQUARE of I(current)
So the heat produced by B must be less than that by A.
Which heater produces more heat?

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