A 60 W electric bulb connected in series with a room heater is further connected across the mains . If 60 W bulb is now replaced by 100 W bulb , will the heat produced by heater be smaller , remain the same or be larger and why ?

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 marked as 50 W-200 V is connected across a 100 V supply. The present power of the bulb is

A few electric bulbs are connected in series to the 220 V mains . One bulb fused , the remaining bulbs are again put in series and connected to the same supply of 220 V. In which case will the bulbs glow brighter and why ?

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

Two electric bulbs each designed to operate with a power of 500 W in a 220 V line are connected in series in a 110 V line . What will be the power generated by each bulb ?

The power of a bulb connected to 120V mains is 60W.What will be its power for 220V mains:

An electric heating coil is connected in series with resistance of xOmega across the 240V mains, the coil being immersed in 1 kilogram of water at 20^@C. The temperature of the water rises to boiling point in 10 minutes. If the resistance x is short circuited, the time required to produce the same quantity of heat in 6 mins. Sb, the value of x is,

An electric heater connected in parallel with an electric bulb is switched on . Explain why the bulb becomes dim . Why dimness decreases after sometime ?

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?