Physics NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 13 PCB MCQ (Single Correct)

The graphs show the variation of current ( -axis) in two photocell and as a function of the applied voltage -axis when light is incident on the cell. Which of the following is the correct conclusion drawn from the data?

A
Cathodes of the two cells are made from the same substance, the intensity of light used are different.
B
Cathodes are made from different substances and the intensity of light is the same.
C
Cathode substances as well as intensity of light are different.
D
No conclusion can be drawn.

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The correct answer is:
A

The stopping potential depends on the substance of the cathode. Since it is same for and , the cathodes are made of the same substance. Since the current of is greater than the current of , the lights used are of different intensities. Light of is more intense.

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