Two bulbs 25W, 220V and 100W, 220V are given. Which has higher resistance?
Text Solution
Verified by ExpertsThe correct answer is:
A
Power of electric bulb
P = 
So, resistance of electric bulb
R = 
Given P 1 = 25W, P 2 = 100W, V 1 = V 2 = 200V
Therefore, for same potential difference V,
R ∝ 
Thus, we observe that for minimum power, resistance will be maximum and vice-versa. Hence, resistance of 25W bulb is maximum and 100W bulb is minimum.
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