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A 2 W carbon resistor is color coded wit...

A 2 W carbon resistor is color coded with green, black, red and brown respectively. The maximum current which can be passed through this resistor is :

Text Solution

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Colour code for carbon resistor
`Bl, Br, R, O, Y, G, Blue, V, Gr, W`
`0,1,2,3,4,5,6,7,8,9`
Resistance `R=ABxxC+-D`
`:.` Resistance `R=50xx10^(2)Omega`
Now using formula power `P=i^(2)R`
`:.i=sqrt(P/R)=sqrt(2/(50xx10^(2)))=20mA`
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