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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 :

A

20 mA

B

63 mA

C

0.2 mA

D

100 mA

Text Solution

Verified by Experts

The correct Answer is:
A
Green `to 5`, Black `to 0`, Red `to 10^(2)`, Brown `to 1%` tolerance
`l^(2)R = P`
`l^(2) =2/(50 xx 10^(2)) = 4 xx 10^(-4) A`
`I = 2 xx 10^(-2)A = 20 mA`
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