Two electric bulbs of 50 W and 100 W are connected with mains in series then which bulb will glow brighter ?

Explanation

In series combination , 50 w bulb will glow brighter than 100 W bulb . We know ,resistance of the bulb ,
`R=(V^(2))/(P),` [ v = potential difference , P = power ]
So the resistance of 50 W bulb is greater than that of 100 W bulb .
In thisn combination , current in both bulbs are same .
As , heat genertion is proportional to `I^(2)R` , thats why 50 W bulb glows brighter than 100 W bulb.