Question:
In a photoelectric graph of stopping potential vs frequency, straight line makes angle \( \theta \) with Y-axis. Then \( \tan \theta = \):
In a photoelectric graph of stopping potential vs frequency, straight line makes angle \( \theta \) with Y-axis. Then \( \tan \theta = \):
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Slope of \( V \) vs \( f \) graph in photoelectric effect gives \( \frac{h}{e} \).
Updated On: May 13, 2025
- \( \frac{h}{e} \)
- \( \frac{e}{h} \)
- \( \sqrt{\frac{h}{e}} \)
- \( \sqrt{\frac{e}{h}} \)
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The Correct Option is A
Solution and Explanation
Einstein’s equation: \( eV = hf - \phi \Rightarrow V = \frac{h}{e}f - \frac{\phi}{e} \)
So slope of graph \( V \) vs \( f \) = \( \frac{h}{e} \Rightarrow \tan \theta = \frac{h}{e} \)
So slope of graph \( V \) vs \( f \) = \( \frac{h}{e} \Rightarrow \tan \theta = \frac{h}{e} \)
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