Multiple choice

You are given three bulbs of 25, 40 and 60 watt all operating at 220 V. Which of the three bulbs has the lowest resistance?

  1. 60 watt bulb

  2. 40 watt bulb

  3. 25 watt bulb

  4. Data insufficient

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

P=V2/R Power is inversely proportional to the square of resistance.