The alternating current in a circuit is described by graph shown in figure. The rms current obtained from graph would be

Options

A. 1.4 A
B. 2.2 A
C. 1.9 A
D. 2.6 A

Answer

A

Explanation

`I_(rms)=sqrt((I_(1)^(2)+I_(2)^(2)+I_(3)^(2))/(3))=sqrt((1^(2)+2^(2)+1^(2))/(3))`
`=sqrt((6)/(3))=sqrt(2)=1.41A`