Question

incandescent bulbs are designed by keeping in mind that the resistance of the filament increases with the increase in temperature if at room temperature 100 w 60 w and 40 w bulb have filament resistance are hundred R60 and R40 respectivelywhat is the relation between these resistance ​

Answer 1

P=V^2/R

P is inversely proportional to R if V is constant

1/R100>1/R60>1/R40

Answer 2

P=V^2/R

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