$B_1$, $B_2$ and $B_3$ are three identical bulbs connected as shown. When all the three bulbs glow, a current of $3 \mathrm{A}$ is recorded by the ammeter.
(i) What happens to the glow of other two bulbs when the bulb $B_1$ gets fused ?
(ii) What happens to the reading of $A_1$, $A_2$, $A_3$ and $A$ when bulb $B_2$ gets fused ?
(iii) How much power is dissipated in the circuit when all bulbs glow together ?