KCET · Chemistry · Structure of Atom

With regard to photoelectric effect, identify the correct statement among the following.

A Energy of electron ejected increases with the increase in the intensity of incident light.
B Number of electron ejected increases with the increase in the frequency of incident light.
C Number of electron ejected increases with the increase in work function.
D Number of electron ejected increases with the increase in the intensity of incident light.

Verified Solution

Answer & Solution

Correct Answer

(D) Number of electron ejected increases with the increase in the intensity of incident light.

Step-by-step Solution

Detailed explanation

Photoelectric effect takes place when the rays of light falls on the surface of a metal with low ionisation energy, ejection of electrons from the surface of the metal takes place. The frequency of light being used, should be suitable. Also, the number of electrons emitted is directly proportional to the intensity of light but does not depend upon its frequency. However, the velocity of the emitted electrons is dependent on frequency of light used.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Explore more questions on app

From KCET

Explore more questions on app