Calculate the crest factor if the peak value of current is 10A and the rms value is 2A.

Options

A. 5A
B. 10A
C. 5
D. 10

Answer

D

Explanation

Moment of inertia of the system of three particle each of mass m about AX
`therefore I_(AX)=I_(AB)+I_(OC)`
`=m(AB)^(2)+m(OC)^(2)`
`=ml^(2)+m(lcos60^(@))^(2)`
`=ml^(2)+m((l)/(2))^(2)`
`=ml^(2)+(ml^(2))/(4)`
`=(5)/(4)ml^(2)`