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Assertion : Photoelectric current depend...

Assertion : Photoelectric current depends on the intensity of incident light.
Reason : Number of photoelectrons emitted per second is directly proportional to intensity of incident radiation.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given assertion and reason, we will break down the concepts step by step. ### Step 1: Understanding the Assertion The assertion states that "Photoelectric current depends on the intensity of incident light." - **Explanation**: In the photoelectric effect, when light of sufficient frequency strikes a metal surface, it can eject electrons from that surface. The photoelectric current is the flow of these emitted electrons. ### Step 2: Understanding the Reason The reason provided states that "Number of photoelectrons emitted per second is directly proportional to intensity of incident radiation." - **Explanation**: The intensity of light is related to the number of photons striking the surface per unit time. If the frequency of the incident light is above the threshold frequency, increasing the intensity (which means more photons) will lead to the emission of more photoelectrons. Thus, the number of emitted photoelectrons is indeed directly proportional to the intensity of the incident light. ### Step 3: Connecting Assertion and Reason Now, we need to connect the assertion and reason. - Since the number of photoelectrons emitted per second is directly proportional to the intensity of the incident light, and since the photoelectric current is defined as the flow of these emitted photoelectrons, we can conclude that the photoelectric current will also depend on the intensity of the incident light. ### Step 4: Conclusion Both the assertion and the reason are true, and the reason correctly explains the assertion. - **Final Statement**: Therefore, we conclude that both the assertion and the reason are true, and the reason is the correct explanation for the assertion. ---
To analyze the given assertion and reason, we will break down the concepts step by step. ### Step 1: Understanding the Assertion The assertion states that "Photoelectric current depends on the intensity of incident light." - **Explanation**: In the photoelectric effect, when light of sufficient frequency strikes a metal surface, it can eject electrons from that surface. The photoelectric current is the flow of these emitted electrons. ### Step 2: Understanding the Reason ...
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