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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

100mA

B

20mA

C

63mA

D

0.4mA

Text Solution

Verified by Experts

B B R O Y G B V G W
0 1 2 3 4 5 6 7
`R=50 times 10^2=5000 Omega` ,br> `P=i^2R implies i_(max)= sqrt(P/R) , sqrt(2/5000)=1/50=20 mA`
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