Question

The vertical component of a voltage phasor V at any instant represents ______.

Options

• The peak voltage v_m​

• The rms voltage (V)

• The instantaneous voltage v_m sin ⁡ωt

• The average voltage over one cycle

Answer 1

The vertical component of a voltage phasor V at any instant represents the instantaneous voltage v_m sin ⁡ωt.

Explanation:

As the phasor rotates with angular speed ω, its projection on the vertical axis gives v_m sin ⁡ωt, which is the instantaneous value of the AC voltage at that moment. The same applies to the current phasor.