Question

Figure shows three bulbs $A$, $B$ and $C$ each of rating $100W$, $220V$ connected to the mains of $220V$. How is the bulb $A$ connected with the mains? At what voltage does it glow?

Answer 1

Bulb $A$ is connected with the mains in parallel. In parallel combination, voltage across the connected appliances remains the same. Hence, the bulb $A$ glows at the voltage of $220V$.