Question:
An electric bulb is rated 220V and 100W. When it is operated on 110V the power consumption will be?
Answer:
We know that,
Voltage (V) = Power (P) x Current (I)
Also, Voltage (V) = Current (I) x Resistance (R)
So, P = V2/R
That is, R = V2/P
Therefore, R = (220)2/100
= 484 ohms
So, Power = (110)2/484
= 25 watts.
So, the bulb has 25 watts of power consumption.
Not what you are looking for? Go ahead and submit the question, we will get back to you.
