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QPages 351-352: Q8: HC Verma: Concepts of Physics - Volume 2 Electric Current through Gases Pages 351-352: Q8 Solution: The plate current in a triode valve is maximum when the…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often assume the plate current is largest at zero grid voltage, confusing the cutoff (negative bias) condition with the maximum‑current condition; in reality a slightly positive grid attracts additional electrons, so the plate current increases as the grid potential becomes positive until saturation is reached.

The plate current in a triode valve is maximum when the potential of the grid is ___________ .

Multiple Choice Options

  • A positive
  • B zero
  • C negative
  • D non-positive

Step-by-Step Verified Solution

**Answer:** (a) positive. **Step-by-Step Explanation:** The plate current is maximum when the grid potential is positive (or least negative).

All Questions in this Chapter

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