Photoelectric Effect NEET Questions

Physics - Dual Nature of Matter and Radiation

Photoelectric Effect MCQ Questions


1.
The photoelectric effect was discovered by:
A.
Albert Einstein
B.
J.J. Thomson
C.
Heinrich Hertz
D.
Wilhelm Hallwachs
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ANSWER :
C. Heinrich Hertz
2.
The photoelectric emission was studied in detail during 1886-1902 by:
A.
Hallwachs and Lenard
B.
Thomson and Bohr
C.
Einstein and Millikan
D.
Hertz and Maxwell
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ANSWER :
A. Hallwachs and Lenard
3.
Hallwachs concluded from his zinc plate experiment that:
A.
Positively charged ions are emitted by metals
B.
Negatively charged particles are emitted by metals under UV light
C.
Metals become magnetic under UV light
D.
Light becomes negatively charged near metals
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ANSWER :
B. Negatively charged particles are emitted by metals under UV light
4.
Photoelectrons are:
A.
Electrons emitted from a metal surface when light of suitable frequency falls on it
B.
Electrons in atomic orbits absorbing photons
C.
Photons emitted from excited atoms
D.
Positively charged particles emitted by hot metals
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ANSWER :
A. Electrons emitted from a metal surface when light of suitable frequency falls on it
5.
Which of the following metals are sensitive to visible light for photoemission?
A.
Lithium, sodium, potassium, caesium
B.
Iron, copper, silver
C.
Tungsten, platinum, gold
D.
Zinc, cadmium, magnesium
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ANSWER :
A. Lithium, sodium, potassium, caesium
6.
In the experimental study of the photoelectric effect, a quartz window is used because:
A.
It reflects ultraviolet light
B.
It is the cheapest transparent material
C.
It absorbs only visible light
D.
It permits ultraviolet radiation to pass through
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ANSWER :
D. It permits ultraviolet radiation to pass through