# (a) Define the terms, (i) threshold frequency, and (ii) stopping potential in the context of photoelectric effect.(b) Draw a graph showing the variation of stopping potential $(V_{0} )$ with frequency $(\nu )$ of incident radiation for a given photosensitive material.

(a) i) Threshold frequency:- it is the minimum frequency requested for the emission of electrons from a metal surface when lights fall on it. The threshold frequency is constant for the given material.

ii) Stopping potential:- It is the minimum negative potential given to the anode plate of the photoelectric tube. for which the photocurrent stops. it is denoted as $V_{0}$ .

b)

* It shows that stopping potential has a linear relation with the frequency of incident radiation.

* It shows that at a certain cut-off frequency to the stopping potential is zero.

* Here, the slope of the graph is equal which means it does not depend on nature of the material, slope equals to $\frac{h}{e}$ (from einstein's equation).

## Related Chapters

### Preparation Products

##### Knockout NEET Sept 2020

An exhaustive E-learning program for the complete preparation of NEET..

₹ 15999/- ₹ 6999/-
##### Rank Booster NEET 2020

This course will help student to be better prepared and study in the right direction for NEET..

₹ 9999/- ₹ 4999/-
##### Knockout JEE Main Sept 2020

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 12999/- ₹ 6999/-
##### Test Series NEET Sept 2020

Take chapter-wise, subject-wise and Complete syllabus mock tests and get in depth analysis of your test..

₹ 4999/- ₹ 2999/-