A bulb 60V- 120W is connectd to 220 VDC line what reistance should be connected so that the bulb will glow bright?

A 220 V -60W electric bulb is connected in 220 V line . What is the resistance of the filament of the bulb , when it is tured on ?

An electric bulb rated for 500 watt at 100 volt is connected to a 200 volt supply line . How much resistance has to be joined in seresies with the bulb so that , the bulb delivers 500 watt ?

5 electric cells are connected in series .Emf of each cell is 1.5 V and internal resistance is 0.1 Omega .When this combination of cells is connected with an external circuit of resistance 4 Omega, what will be the current through that resistance? What resistance should be connected instead of 4 Omega so that the current will be halved?

The resistance of an electrical appliance is 200 Omega and it can withstand a maximum current of 1A. To operate the appliance on a dc source of 220 V what minimum resistance should be connected in series with it?

If three bulbs of ratings 60W, 75W and 100 W are connected to 220 v mains in series, then which bulb will burn most brightly?

Two electric bulbs of 50 W and 100 W are connected in mains once in (ii) prallel combi-nation . Which bulb will glow brighter in each case ?

If two bulbs of powers 60 W and 40 W be joined in series with 220 V main line, then which bulb will glow brighter and why ?

A current of 1A flow when an electric bulb is connect to 220 V mains. What would be the current when the same bulb is connected to 110 V mains?

Two bulbs of power 60 W and 100 W , joined in series , are connected to the electric mains . Which one of these two will glow brighter , and why ?