An electric bulb is made of tungsten filament of resistance RΩ. It is marked 100W and 230V. Then, the value of R is :
A bulb is rated at 230V- 100W. What is its resistance? Two such bulbs are switched-on for 4 hours continously. How much electrical energy is consumed by these two bulbs together?
An electric bulb is marked 220V-100W. The bulb is connected to a 220V supply. Calculate
a) the resistance of the filament.
b) current flowing through the filament.
A filament bulb (500w , 100 v) is to be used in 230v main supply . When resistance R is connected in series , it works perfectly and the bulb consumes 500w . The value of R is.