Photoelectric Effect: Experiment AR & Other Type MCQs Dual Nature of Radiation and Matter Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Q1:

The figure shows a plot of photocurrent versus anode potential for a photosensitive surface for three different radiations. Which one of the following is a correct statement?

1.	Curves a and b represent incident radiations of different frequencies and different intensities.
2.	Curves a and b represent incident radiation of the same frequency but of different intensities.
3.	Curves b and c represent incident radiation of different frequencies and different intensities.
4.	Curves b and c represent incident radiations of the same frequency having the same intensity.

Subtopic: Photoelectric Effect: Experiment |

85%

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AIPMT - 2009

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Q2:

In the given graph of the photoelectric experiment, the maximum energy of the emitted photoelectron will be:

1.	\(2\) eV	2.	\(0\) eV
3.	\(4\) eV	4.	\(4\) J

Subtopic: Photoelectric Effect: Experiment |

59%

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Q3:

The figure shows different graphs between stopping potential \(V_0\) and frequency \(v\) for photosensitive surfaces of cesium, potassium, sodium, and lithium. The plots are parallel. Which of the following about their work function is correct?

1.	\((i) > (ii) > (iii) > (iv)\)
2.	\((i)>(iii)>(ii)> (iv)\)
3.	\((iv)>(iii)>(ii)> (i)\)
4.	\((i)=(iii)>(ii)= (iv)\)

Subtopic: Photoelectric Effect: Experiment |

80%

From NCERT

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Q4:

If stopping potential \(V_{0}\) is plotted versus frequency \(\nu\) in an experiment of the photoelectric effect, the graph as shown in the diagram is obtained. Then: (e is an electronic charge)

1.	Planck's constant = \(\frac{b}{a}\)
2.	Planck's constant = \(\frac{eb}{a}\)
3.	Planck's constant = \(\frac{a}{b}\)
4.	Planck's constant = \(\frac{ea}{b}\)

Subtopic: Photoelectric Effect: Experiment |

74%

From NCERT

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Q5:

Given below are two statements:

Assertion (A):	The threshold frequency of the photoelectric effect supports the particle nature of sunlight.
Reason (R):	If frequency of incident light is less than the threshold frequency, electrons are not emitted from metal surface.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

Subtopic: Photoelectric Effect: Experiment |

61%

From NCERT

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Q6:

Given below are two statements:

Assertion (A):	The work function of aluminium is \(4.2~\text{eV}\). Emission of electrons will not be possible if two photons, each of energy \(2.5~\text{eV}\), strike an electron of aluminium.
Reason (R):	For photoelectric emission, the energy of each photon should be greater than the work function of aluminium.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	Both (A) and (R) are False.

Subtopic: Photoelectric Effect: Experiment |

87%

From NCERT

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Q7:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A):	When ultraviolet light is incident on a photocell, its stopping potential is V₀and the maximum kinetic energy of the photoelectrons is K_max. When the ultraviolet light is replaced by X-rays, both V₀and K_maxincrease.
Reason (R):	Photoelectrons are emitted with a speed ranging from zero to a maximum value because of the range of frequencies present in the incident light.

In the light of the above statements choose the correct answer from the options given below:

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

Subtopic: Photoelectric Effect: Experiment |

From NCERT

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Q8:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A):	Stopping potential depends upon the frequency of incident light but is independent of the intensity of the light.
Reason (R):	The maximum kinetic energy of the photoelectron is proportional to stopping potential.

In the light of the above statements choose the correct answer from the options given below:

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

Subtopic: Photoelectric Effect: Experiment |

65%

From NCERT

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Q9:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A):	The photoelectrons produced by a monochromatic light beam incident on a metal surface, have a spread in their kinetic energies.
Reason (R):	The work function of the metal varies as a function of depth from the surface.

In the light of the above statements choose the correct answer from the options given below:

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

Subtopic: Photoelectric Effect: Experiment |

52%

From NCERT

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Q10:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A):	In a photoelectron emission the velocity of an electron ejected from near the surface is larger than that coming from the interior of metal.
Reason (R):	The velocity of all ejected electrons will be zero.

In the light of the above statements choose the correct answer from the options given below:

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

Subtopic: Photoelectric Effect: Experiment |

67%

From NCERT

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