Question

An electric bulb rated 100w,40v has tp be operated across 50v,50hz



a.C. Supply.The capacitance of the capacitor which has to be connected in series with the bulb is

Answer 1

A 50 w, 100 v lamp is to be connected to an AC main of 50 hz, what should the essential capacitance of the capacitor to be put in series with the lamp be?

A 50W lamp would have a resistance , while operating of X.

We know the voltage to be applied , is 100V.

From this we can calulate the current from

P = E * I ,and solving for I we get a 2 Ampere current.

R, the esistance of the wire in the bulb will be 50 ohms,

Ohms law says R = V / I , so that is what gives the value of 50.

Hope this helps you ☺️☺️⭐✨✨⭐✌️✌️