alleryA 12 V supply feeds three identical bulbs in series. What voltage drop is across each?
A4 V
B12 V
C36 V
D3 V
Answer & Solution
Correct answer: A. 4 V
1. In series the supply voltage is the sum of the drops.
2. Three identical bulbs share equally: 12 / 3 = 4 V.
3. 12 V would apply to parallel bulbs, and 36 V and 3 V are miscalculations.
_Source: Wikipedia, Series and parallel circuits, Voltage_
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