The maximum energy of the electrons released in photocell is independent of:
Correct answer: B. Intensity of incident light
- A. Frequency of incident light
- B. Intensity of incident light
- C. Nature of cathode surface
- D. Wavelength of light
Explanation
The working of a photocell can be explained by the photoelectric effect.•The photoelectrons which are released when a beam of light falls on the cathode are independent of the intensity of light. •It does depend upon the frequency of incident light, the effect will only be observed if the incident light has the frequency of a specific value known as threshold frequency.•And should have a specific wavelength known as cutoff wavelength.• As long as the incident wave doesn't have the frequency and wavelength equal or greater than the required values no effect will be observed.• Different metals have different values of threshold frequencies so the nature of the cathode is also taken into consideration. •consider the following equationK.Emax= hv-work functionThis shows that the max kinetic energy of electrons depends upon frequency, wavelength, and work function and work function depends upon the nature of the metal being used as a cathode.So it's independent of the intensity of light.
Last updated
About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1.5 mW of 400 nm light is directed at a photoelectric cell. If 0.1% of the incident photons produce photoelectrons, the current in the cell is:
1.5 mW of 400 nm light is directed at a photoelectric cell. If 0.1% of the incident photons produce photoelectrons, the current in the cell is:
A 5 watt LED bulb converts 80% of the power into light photons wavelength 660 nm. What is the number of photons emitted from the bulb in one second.
A black body is considered ideal when it:
A body at temperature T radiates heat according to relation: