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QPage 276: Q10: HC Verma: Concepts of Physics - Volume 2 Permanent Magnets Page 276: Q10 Solution: Which of the following four graphs may best represent the…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often mistake the galvanometer’s equation $Ipropto an heta$ for a straight‑line dependence $Ipropto heta$. The correct graph of current versus deflection angle is a tangent curve, not a linear one, so the plotted function must rise steeply near $ heta=pm90^circ$ and pass through the origin.

Which of the following four graphs may best represent the current-deflection relation in a tangent galvanometer?

Multiple Choice Options

  • A Graph a
  • B Graph b
  • C Graph c
  • D Graph d

Step-by-Step Verified Solution

**Answer:** Graph c. **Step-by-Step Explanation:** In a tangent galvanometer, the current is proportional to tan _. So the graph of I vs _ is a tangent curve. Graph c represents this.

All Questions in this Chapter

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