Twenty electric bulbs are connected in series. If one bulb gets fused suddenly and the circuit is reconnected, then find the percentage change in illumination of each bulb.

40 electric bulb are connected in series across a 220 V supply. After one bulb is fused the remaining 39 are connected again in series across the same supply. The illumination will be

Some electric bulbs are connected in series across a 220 V supply in a room. If one bulb is fused then remaining bulbs are connected again in series across the same supply. The illumination in the room will

Twenty one electric bulbs are connected in series with the mains of a 220V supply. After one bulb is fused, the remaining 20bulbs are again connected in series across the same mains. By what percentage will the illuminaton of (i) a bulb change and (ii) all the bulbs change?

Assertion : If three identical bulbs are connected in series as shown in figure then on closing the switchs. Bulb C short circuited and hence illumination of bulbs A and B decreases. Reason : Voltage on A and B decreases

3 identical bulbs are connected in series and these together dissipate a power P . If now the bulbs are connected in parallel, then the power dissipated will be

The two electric bulbs of same power are connected in parallel circuit. If one bulb is glowing and then another bulb is switched on, then brightness of the first bulb increases, decreases or remians unchanged. Expalin.

n identical bulbs are connected in series and illuminated by a power supply . One of the bulbs gets fused. The fused bulb is removed , and the remaining bulbs are again illuminated by the same power supply. Find the fractional change in the illuminated of (a) all the bulbs and (b) one bulb.