Question

is the filament of 240v 1000w bulb thicker then 240v 100w why

Answer 1

p= vi
1000/ 240 = i
4.16 ampere= i

p= vi
100/ 240 = i
0.4 ampere= i
since,
a is thicker wire....
u can also use r cause ris inversely propotional to 1/a

Answer 2

The filament of 240v 100w is thicker because it has a larger safe limit than the 240v 1000w and so more amounts of current lasses through it.
P= V2/I
.°. I =V2/P
I = 240 × 240/1000
= 57.6A

I = 240 ×240/100
I = 576A