Out of 60 W and 40 W lamps,which one has higher resistance when in use?
In this problem, which formula must be applied to get the result?
P = \(\frac{V^{2}}{R}\) OR P = \(I^{2}R\)
40 W has higher resistance.
Assuming supply is same => V is same, the first formula should be used. If I were constant the second formula should have been used.