Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with increase in temperature. If at room temperature, 100 W, 60 W and 40 W bulbs have filament resistances R 100 , R 60 and R 40 , respectively, the relation between these resistance is
A
B
R 100 = R 40 + R 60
C
R 100 > R 60 > R 40
D
Text Solution
Verified by ExpertsThe correct answer is:
D
We know that 
For a given potential difference at a particular temperature.
It is given that the powers of the bulbs are in the order
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