Question

B1 B2 B3 are three identical bulbs connected when all ammeters A1 A2 A3 are connected.when all the bulbs glow then the current of 3A is recorded by ammeter A
What happens to the reading of A1 A2 A3 and A when the bulb B2 gets fused

Answer 1

sincethe bulbs are connected together the energy must pass together when B2 is fused the world current would suggest 0

please mark this is brilliant answer

Answer 2

Answer:

Req=4.5/3=1.5

Resistance of each bulb is 4.5ohm

(a) when B1 get fuse req increases and current decreases bulbs glow less

(b) A2 =0, A1=A3=1amp, A=2amp

(c) power =3i^2R=13.5watt