1.

If I_(1), I_(2), I_(3) and I_(4) are the respective r.m.s. values of the time varying currents as shown in the four cases I, II, III and IV. Then identify the correct relations.

Answer»

`I_(1)=I_(2)=I_(3)=I_(4)`
`I_(3) GT I_(1)=I_(2) gtI_(4)`
`I_(3) gt I_(4)gt I_(2)=I_(1)`
`I_(3)gt I_(2)gt I_(1)gt I_(4)`

SOLUTION :`I_(rms)=sqrt(1/Tint_(0)^(T)I^(2)dt)`

`int I_(2)dt` = area of `I^(2)-t` curve on time axis will be maximum for `III` than for and `I` and `II` and least `IV`. `I_(3) gt I_(1)=I_(2) gt I_(4)`


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