There are four bulbs of power 100 W , 200 W , 500 W and 1000 W. Among these whose filament has high resistance? (Assuming same voltage source)

Question

There are four bulbs of power 100 W , 200 W , 500 W and 1000 W. Among these whose filament has high resistance? (Assuming same voltage source) (A) 100W bulb (B) 200 W bulb (C) 500 W bulb (D) 1000W bulb

Tardigrade Admin · Accepted Answer

For bulbs, Power, P=(V2/R) R ⇒ R propto (1/P), Assuming same voltage source Hence, bulb with least power has highest resistance i.e., 100 W bulb filament has high resistance.

Q. There are four bulbs of power $100 W, 200 W, 500 W$ and $1000 W$ . Among these whose filament has high resistance?
(Assuming same voltage source)

100W bulb

200 W bulb

500 W bulb

1000W bulb

For bulbs, Power, $P = \frac{V ^{2}}{R}$
$R \Rightarrow R \propto \frac{1}{P}$ , Assuming same voltage source
Hence, bulb with least power has highest resistance
i.e., $100 W$ bulb filament has high resistance.

Q. There are four bulbs of power 100W,200W,500W and 1000W. Among these whose filament has high resistance? (Assuming same voltage source)