Question:
The plot of maximum kinetic energy of photo-electrons vs the energy of incident photons above threshold frequency is ________.
The plot of maximum kinetic energy of photo-electrons vs the energy of incident photons above threshold frequency is ________.
Show Hint
The slope of a $K_{max}$ vs frequency ($\nu$) graph is always Planck's constant ($h$).
Updated On: Jun 26, 2026
- an oblique straight line with a positive slope.
- an oblique straight line with a negative slope.
- an oblique straight line passing through the origin.
- an exponential curve.
- a polynomial curve of order 2.
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Concept
Use Einstein's Photoelectric Equation: $K_{max} = h\nu - \phi$.
Step 2: Meaning
This follows the linear equation $y = mx + c$, where $y = K_{max}$ and $x = h\nu$ (incident energy).
Step 3: Analysis
The slope ($m$) is 1 (positive), and the y-intercept is $-\phi$ (work function).
Step 4: Conclusion
The graph is an oblique straight line with a positive slope. Final Answer: (A)
Use Einstein's Photoelectric Equation: $K_{max} = h\nu - \phi$.
Step 2: Meaning
This follows the linear equation $y = mx + c$, where $y = K_{max}$ and $x = h\nu$ (incident energy).
Step 3: Analysis
The slope ($m$) is 1 (positive), and the y-intercept is $-\phi$ (work function).
Step 4: Conclusion
The graph is an oblique straight line with a positive slope. Final Answer: (A)
Was this answer helpful?
0
0
Top KEAM Physics Questions
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- Two capillary tubes A and B of diameter $1\, mm$ and $2\, mm$ respectively are dipped vertically in a liquid. If the capillary rise in A is 6 cm, then the capillary rise in B is
- In the circuit given in figure, 1 and 2 are ammeters. Just after key K is pressed to complete the circuit, the reading will be
- A plate has a length $ 5\pm 0.1\text{ }cm $ and breadth $ 2\pm 0.01\text{ }cm $ . Then the area of the plate is:
View More Questions
Top KEAM Photoelectric Effect Questions
- The ratio of the respective de Broglie wavelengths associated with electrons accelerated from rest with the voltages 100 V, 200 V and 300 V is
- Millikan's oil-drop experiment established that
- The material that is not photo sensitive to visible light is
- The photoelectric work function for a photosensitive material is 5.2 eV. The energy of the incident radiation for which the stopping potential is 6 V is
- Threshold frequency for photoelectric effect from a metallic surface corresponds to a wavelength of 6000 \({Å}\). The photoelectric work function for the metal is \( h = 6.6 \times 10^{-34} \, {Js} \):
View More Questions
Top KEAM Questions
- i.$\quad$ They help in respiration ii.$\quad$ They help in cell wall formation iii.$\quad$ They help in DNA replication iv. $\quad$They increase surface area of plasma membrane Which of the following prokaryotic structures has all the above roles?
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- If $\int e^{2x}f' \left(x\right)dx =g \left(x\right)$, then $ \int\left(e^{2x}f\left(x\right) + e^{2x} f' \left(x\right)\right)dx =$
View More Questions