Assertion (A): In his study of photoelectric emission, Hallwachs connected a negatively…
Physics · Class 12 · CBSE — Dual Nature of Radiation & Matter
Assertion (A): In his study of photoelectric emission, Hallwachs connected a negatively charged zinc plate to an electroscope. He found that negatively charged particles were emitted from the zinc plate under the action of visible light.
Reason (R): An uncharged zinc plate becomes positively charged when it is irradiated by visible light.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
(A) Both A and R are true and R is the correct explanation of A.
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- Assertion (A): An electron microscope is based on de Broglie hypothesis. Reason (R): A beam of electrons…
- The figure shows the variation of maximum kinetic energy ( K _ ) of emitted electrons as a function of the…
- The de Broglie wavelength associated with a ball of mass 150 g travelling at 30 m s –1 is
- In the question number 26, find the wavelength of the incident light if the stopping potential is 0.6 V.
- A proton, a neutron, an electron and an α-particle have same kinetic energy. Then their de Broglie…
- A particle is dropped from a height H . The de Broglie wavelength of the particle as a function of height is…
- A particle is moving three times as fast as an electron. The ratio of the de Broglie wavelength of the…
- The stopping potential V _ 0 measured in a photoelectric experiment for a metal surface is plotted against…
More Dual Nature of Radiation & Matter questions · Browse all practice questions