Question

The sine waveform produces the ________ disturbance in the electrical circuit and is the smoothest and ________.

1. most, poor efficient waveform
2. Least, poor efficient waveform
3. Least, efficient waveform
4. most, efficient waveform

Answer 1

Correct Answer - Option 3 : Least, efficient waveform

Following are the advantages of using a sine waveform in electrical circuits.

• Sinusoids are invariant in their waveshape when subjected to time-domain differentiation and integration.
  • cosine and sine are actually the same waveforms with 90 degrees phase difference.
  • ​so it produces a minimum disturbance in the electrical circuits during operation.
• A two winding transformer can easily and efficiently change voltage levels in a power system for sinusoidal voltages.
• A broad class of periodic and aperiodic waveforms can be expressed as a sum of harmonically related sinusoids.
• About 80% of our power system load being an Induction Motor, the efficiency of an Induction Motor is maximum for a sinusoidal voltage over other waveforms.