Question

Two bulbs have rating 100W, 220V and
60W, 220V. Which one has the greatest
resistance?​

Answer 1

Answer:

hey

according to ohm's law ..

V= IR

v is directly proportional to R

so here v is same .

So, 60W is the answer..

Answer 2

Answer:

Step-by-step explanation:

Given :-

Two bulbs have rating 100W, 220V and  60W, 220V.

To Find :-

Which one has the greatest  resistance.

Formula to be used :-

P = V²/R

Solution :-

Putting all the values, we get

For Bulb A

⇒ 100 = (220×220)/R₁

⇒ R₁ = 484 ohm

For Bulb B

⇒ 60 = (220 × 220)/R₂

⇒ R₂  = 806.6 ohm

Hence, bulb B having 60W, 220V will have greater resistance.

Terms to be known :-

P is power in Watt (W) .

R is resistance in ohm .

V is voltage in volts (V) .