As more resistors are added in parallel across a constant voltage source, the po
ID: 1540407 • Letter: A
Question
As more resistors are added in parallel across a constant voltage source, the power supplied by the source increases. decreases. does not change. In the circuit shown in the figure, all the lightbulbs are identical. Which of the following is the correct ranking of the brightness of the bulbs? A and B have equal brightness, and C is the dimmest. B and C have equal brightness, and A is the dimmest. A is brightest C is dimmest, and B is in between. A is the brightest and B and C have equal brightness but less than A. All three bulbs have the same brightness.Explanation / Answer
1) Ans- A
Electric power = VI
As more resistors are connected in parallele across a constant voltage supply that means ,the voltage across each resistor is constant.Since the effective resistance of parallel combination is smaller than individual resistance ,the current in the circuit increases.As power =VI and V is constant ,the power increases.
2)Circuit diagram?
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