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What is the r.m.s. value of an alternati...

What is the r.m.s. value of an alternating current which when passed through a resistor produces heat which is thrice of that produced by a direct current of `2` amperes in the same resistor?

A

`6A`

B

`3A`

C

`2A`

D

`2sqrt3A`

Text Solution

Verified by Experts

The correct Answer is:
D
`i_(rms)^(2) R = 3 i_(dc)^(2) R`
`i_(rms) = i_(dc) sqrt3 = 2 sqrt3 A` .
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