Physics, 17.07.2019 14:30 luckyalita

Asmall bulb has a resistance of 2 ohm when cold it take up a current of 0.4 ampere from a source of 4v then start glowing? calculate resistance when it is glow and elaborate the reason of difference between resistance ?

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Asmall bulb has a resistance of 2 ohm when cold it take up a current of 0.4 ampere from a source of...