A small bulb has a resistance of 2 Omega when cold It takes up a current of 0 4 A from a sourc...........

Physics Chapter - 12

A small bulb has a resistance of 2Ω when cold. It takes up a current of 0.4 A from a source of 4V and then starts glowing. Calculate (i) the resistance of the bulb when it is glowing and (ii) Elaborate on the reason for the difference in resistance?

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Master Chapter - 12

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