TS EAMCET · Physics · Current Electricity
There are four bulbs of power \(100 \mathrm{~W}, 200 \mathrm{~W}\), \(500 \mathrm{~W}\) and 1000W. Among these whose filament has high resistance? (Assuming, same voltage source)
- A 100 W bulb
- B 200 W bulb
- C \(500 \mathrm{~W}\) bulb
- D \(1000 \mathrm{~W}\) bulb
Answer & Solution
Correct Answer
(A) 100 W bulb
Step-by-step Solution
Detailed explanation
For bulbs, Power, \(P=\frac{V^2}{R}\) \(\Rightarrow R \propto \frac{1}{P}\), Assuming same voltage source Hence, bulb with least power has highest resistance i.c., \(100 \mathrm{~W}\) bulb filament has high resistance.
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