Question

You are provided three bulbs of 15, 40 and 60 watt. Which of them has lowest resistance:

• A. 40 watt bulb
• B. 60 watt bulb
• C. 25 watt bulb
• D. Information is insufficient

Answer 1

Answer: (B)

60 watt bulb

Answer 2

Using the formula $R\propto \frac{1}{P}$ hence 60 watt bulb will have lowest resistance.