Calculate the current through a 60 W lamp rated for 250V If the line voltage falls to 200V, how - Physics - Electric energy power and Household circuits

Question

Calculate the current through a 60 W lamp rated for 250V If the
line voltage falls to 200V, how is the power consumed by the bulb
affected ?

Vijay Yadav · Accepted Answer

We know,
P = V2 / R
=> R = V2 /P = (250*250)/60 = 1041 67
Î©
Power consumed by bulb = (200)2/1041 67 = 38 40 W
So, 60W bulb act as 38 40W bulb

Calculate the current through a 60 W lamp rated for 250V .If the line voltage falls to 200V, how is the power consumed by the bulb affected ?