Practice portal › Alternating Current › Alternating Quantities: RMS and Mean
Asked in GUJCET 2017 · RMS and mean values
Given: I = 50 cos(100t + 45°) A, so the peak value is I₀ = 50 A.
Idea: the rms value of a sinusoid depends only on its amplitude; the angular frequency (100 rad s⁻¹) and the phase (45°) do not matter.
Iᵣₘₛ = (I₀)/(√2) = (50)/(√2) = 25√2 A ≈ 35.4 A.
Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.
Practise this with a timer