Question

Rms value of current is equal to 3 sin omega t + 4 cos omega t is given by

Answer 1

What I see is a is a steady state DC current, 2 Amps, and a simple sinewave with a peak amplitude of 3 amps. This follows the form of:

To find the RMS value you need to take the square root of the sum of the squared values. As an integral then this would look like:

I(rms) = square root of (

)

Performing the math will give you:

Thus I (rms) = Sqrt. ( 2^2 + 3^2/2) = Sqrt. ( 4/2 + 9/2) = Sqrt. (17/2)

I(rms) = 2.9155 amps, just as given by Laurens De Wilde, below.

Answer 2

Answer: answer is first option

Explanation: