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The Flow of Electrons as Electric Current

8.A 100w bulb...

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8.A 100w bulb and a 25w bulb are designed for the same voltage .they have filaments of the same length and material. The ratio of the diameter of the 100w bulb to that of the 25w bulb is??

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100 - W

25 - W

bulb are designed for the same voltage. They have filaments of the same length and material. The ratio of the diameter of the

100 - W

bulb to that of the

25 - W

25 W - 120 V

100 W - 120 V

bulb are connected in series across a

120 V

line. Which bulb will glow brighter?

R_{1}

R_{2}

are respectively the filament resistance of a

200 W

100 W

bulb designed to operate on the same voltage then

R_{1}

R_{2}

are the filament resistances of a

200 W

100 W

bulb respectively designed to operate on the same voltage, then:

Q. A 25W and 100W bulb are joined in series and connected to the mains. Which bulb will glow brighter?

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