Three bulbs of powers P1, P2 and P3 (P1 < P2 < P3) are connected in a certain way such that P3 glows the brightest.
(a) What type of connection exists between these bulbs?
(b) Compare the voltages (V1, V2, V3) across these bulbs. (Use >, < or =)
(c) Will the circuit still function if one of the bulbs is fused?
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(a) 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. So, the bulb with the highest power rating (P3) will draw the most current and glow brightest.
(b) In a parallel circuit, all components share the same voltage.
So,
V1 = V2 = V3
(c) 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.