1.

when electric bulbs of same power,but different marked voltage are connected in series across the power source,their brightness will be 1.proportional to their marked voltage 2.inversely proportional to their marked voltage 3.proportional to the square of their marked voltages 4.inversely proportional to the square of their marked voltage

Answer»

when electric bulbs of same power,but different marked voltage are connected in series across the power source,their brightness will be

1.proportional to their marked voltage

2.inversely proportional to their marked voltage

3.proportional to the square of their marked voltages

4.inversely proportional to the square of their marked voltage



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