1. Which of the following is true for a sinusoidally varying ac voltage: (a) Vm = Vrms,...

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1. Which of the following is true for a sinusoidally varying ac voltage:

(a) ΔVm = ΔVrms,

(b) ΔVm ≈ (0.707)ΔVrms,

(c) ΔVrms ≈ (0.707)ΔVm, or

(d) ΔVrms

≈ (0.5)ΔVrms?

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