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QPages 338-339: Q6: HC Verma: Concepts of Physics - Volume 2 Electromagnetic Waves Pages 338-339: Q6 Solution: An electric field and a magnetic field exist in a region. The…
⚠️ Common Exam Traps & Conceptual Pitfalls
Students often treat $\vec E\perp\vec B$ as a universal rule for any electromagnetic wave, forgetting it holds strictly for an ideal plane wave in free space; in near‑field regions, superpositions, or guided modes the fields can have arbitrary angles, so non‑perpendicular fields do not conclusively prove a wave is absent nor guarantee its presence.
An electric field and a magnetic field exist in a region. The fields are not perpendicular to each other.
Multiple Choice Options
- A This is not possible.
- B No electromagnetic wave is passing through the region.
- C An electromagnetic wave may be passing through the region.
- D An electromagnetic wave is certainly passing through the region.
Step-by-Step Verified Solution
**Answer:** (b), (c).
**Step-by-Step Explanation:**
If E and B are not perpendicular, no electromagnetic wave is passing (b). An electromagnetic wave may be passing if they are not perpendicular in a specific configuration (c).
All Questions in this Chapter
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