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The resistance of a wire of iron is 10 o...

The resistance of a wire of iron is `10 ohm` and temperature coefficient of resistivity is `5 xx 10^-3//.^@C`, At `20^@C` it carries `30 mA` of current. Keeping constant potential difference between its ends. The temperature of the wire is raised to `120^@C`. The current in `mA` that flows in the wire now is.

A

20

B

15

C

10

D

40

Text Solution

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The correct Answer is:
A
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