The magnetic effect of electric current was discovered by

Options

A. Maxwell
B. Oersted
C. Ampere
D. none of these

Answer

**Step-by-Step Solution:**

1. **Identify the Context**: The question asks about the discovery of the magnetic effect of electric current, which is a fundamental concept in physics.

2. **Historical Background**: Before 1820, there was a common belief that magnetic fields and electric currents were unrelated phenomena.

3. **Key Discovery**: In 1820, a scientist named Hans Christian Ørsted made a significant discovery. He found that an electric current flowing through a wire could create a magnetic field around it.

4. **Conclusion**: Therefore, the scientist who discovered the magnetic effect of electric current is Hans Christian Ørsted.

**Final Answer**: Hans Christian Ørsted.

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