You are given three bulbs of 25 W, 40 W and 60 W marked at 220 V. Which one of them has lowest resistance?
The power of a bulb is given by
Hence, the resistance will be minimum if the power is maximum. So, 60W bulb will have largest resistance.
10
You are given three bulbs of 25 W, 40 W and 60 W marked at 220 V. Which one of them has lowest resistance?
The power of a bulb is given by
Hence, the resistance will be minimum if the power is maximum. So, 60W bulb will have largest resistance.