out of phase by 90°
out of phase by 60°
out of phase by 30°
out of phase by 0°
Answer is Wrong!
Answer is Right!
The correct answer is A. out of phase by 90°.
In an AC co-ordinate potentiometer, the currents in the phase and quadrature potentiometers are adjusted to be out of phase by 90°. This is done to ensure that the output of the potentiometer is a pure sine wave. If the currents were not out of phase by 90°, the output would be a distorted sine wave.
The phase potentiometer is used to control the phase angle of the output signal. The quadrature potentiometer is used to control the amplitude of the output signal. By adjusting the settings of the two potentiometers, the output signal can be controlled to be a pure sine wave.
The following is a brief explanation of each option:
- Option A: out of phase by 90°. This is the correct answer. The currents in the phase and quadrature potentiometers are adjusted to be out of phase by 90° to ensure that the output of the potentiometer is a pure sine wave.
- Option B: out of phase by 60°. This is not the correct answer. The currents in the phase and quadrature potentiometers are not adjusted to be out of phase by 60°.
- Option C: out of phase by 30°. This is not the correct answer. The currents in the phase and quadrature potentiometers are not adjusted to be out of phase by 30°.
- Option D: out of phase by 0°. This is not the correct answer. The currents in the phase and quadrature potentiometers are not adjusted to be out of phase by 0°.