Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
413 views
in Dual Nature of Radiation and Matter by (26.7k points)
closed by

In figure below represents the variation of current with potential fora metal

1. Identify the law governing it.

2. Even when the potential is zero, there is current. Explain.

3. Current is zero for a particular potential. How does this potential help in determining the velocity of electrons.

1 Answer

+1 vote
by (26.1k points)
selected by
 
Best answer

1. Laws of photoelectric emission

  • For a given frequency of radiation, number of photo electrons emitted is proportional to the intensity of incident radiation.
  • The K.E. of photo electrons depends on the frequency of incident light but is independent of the light intensity.

2. When radiation falls on metal, photo electrons are emitted with certain velocity even if accelerating potential is zero.

3. At slopping potential (v0), photo current is zero ie. 1/2 mv2max = ev0

Vmax = \(\sqrt{\frac{2eV_o}{m}}\)

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

...