Question

Three bulbs of powers P₁, P₂ and P₃ (P₁ < P₂ < P₃) are connected in a certain way such that P₃ glows brightest.

1. What type of connection exists between these bulbs?
2. Compare the voltage across these bulbs. (Use >, < or =)
3. Will the circuit still function if one of the bulbs is fused?

Answer 1

1. All bulbs are connected in parallel combination because in a parallel connection, voltage across each bulb is the same, and brightness depends directly on power rating. Therefore, the bulb with the highest power rating (P₃) will draw the most current and glow brightest.
2. In a parallel circuit, all components share the same voltage.
   So, V₁ = V₂ = V₃
3. Yes, because in a parallel circuit, each bulb has an independent path to the power supply and if one bulb fuses, the others continue to receive power and function normally.