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QPages 338-339: Q1: HC Verma: Concepts of Physics - Volume 2 Electromagnetic Waves Pages 338-339: Q1 Solution: A magnetic field can be produced by

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often recall only moving charges (currents) as magnetic field sources and forget the $mu_0\varepsilon_0\frac{\partial\mathbf{E}}{\partial t}$ term in Ampère‑Maxwell law; remember that a time‑varying electric field also generates a magnetic field.

A magnetic field can be produced by

Multiple Choice Options

  • A a moving charge
  • B a changing electric field
  • C Neither of them
  • D Both of them

Step-by-Step Verified Solution

**Answer:** (d) Both of them. **Step-by-Step Explanation:** A magnetic field can be produced by a moving charge and by a changing electric field.

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