CUET Preparation Today
The following have zero average value in a plane electromagnetic wave |
electric field only magnetic field only both electric field and magnetic field both electric energy and magnetic energy |
both electric field and magnetic field |
The correct answer is Option (3) → both electric field and magnetic field In a plane electromagnetic wave, the electric field (E) and magnetic field (B) vary sinusoidally with time. The average value of a sinusoidal quantity (like sin or cos) over one complete cycle is zero. Therefore, both electric field and magnetic field have zero average value. Correct Option: both electric field and magnetic field |
