We have a `30 W, 6 V` bulb , which we want to glow by a supply of `120 V` . What can be done for this ?

If a 30 V, 90 W bulb is to be worked in 120 V line, the resistance to be counnected in series with the bulb is

If a 30 V, 90 W bulb is to be worked in 120 V line, the resistance to be connected in series with 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 and B are two electric bulbs with their ratings respectively 40 W, 110 V and 100 W and 110 V. Find their respective filament resistances. If the bulbs are connected in series with a supply of 220 V, which bulb will fuse ?