Physics-
General
Easy
Question
For the photoelectric effect, the maximum kinetic energy 
of the emitted photoelectrons is plotted against the frequency n of the incident photons as shown in the figure. The slope of the curve gives
- Charge of the electron
- Work function of the metal
- Planck's constant
- Ratio of the Planck’s constant to electronic charge
The correct answer is: Planck's constant
Comparing Einstein’s equation
, with 
we get slope, 
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