Photoelectric Effect NEET Questions

Physics - Dual Nature of Matter and Radiation

Photoelectric Effect MCQ Questions


13.
In the photoelectric effect apparatus, the function of the commutator is to:
A.
Convert AC to DC
B.
Reverse the polarity of the emitter and collector plates
C.
Measure the photocurrent
D.
Filter out unwanted frequencies
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ANSWER :
B. Reverse the polarity of the emitter and collector plates
14.
Which of the following metals has the highest work function?
A.
Cesium
B.
Potassium
C.
Sodium
D.
Platinum
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ANSWER :
D. Platinum
15.
In a photoelectric setup, the photocurrent is measured by:
A.
A galvanometer for high currents
B.
A microammeter
C.
An electroscope
D.
A voltmeter
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ANSWER :
B. A microammeter
16.
The stopping potential in a photoelectric experiment is directly proportional to:
A.
Intensity of incident light
B.
Frequency of incident light
C.
Work function of the metal
D.
Number of photoelectrons emitted
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ANSWER :
B. Frequency of incident light
17.
The intensity of light in a photoelectric experiment is varied by:
A.
Changing the distance between the source and the emitter
B.
Using different colored filters
C.
Heating the source
D.
Changing the applied voltage
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ANSWER :
A. Changing the distance between the source and the emitter
18.
Which of the following statements is true about the photoelectric effect?
A.
It supports the wave nature of light
B.
It supports the particle nature of light
C.
It contradicts quantum theory
D.
It is independent of the metal used
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ANSWER :
B. It supports the particle nature of light