Dual Nature of Radiation and Matter
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Photoelectric Effect
SubtopicPhotoelectric Effect under Dual Nature of Radiation and Matter for Grade 12 CBSE.
Preview questions (no answers)
- 1.
The minimum frequency of incident radiation required to cause the emission of electrons from a metal surface is known as:
A.Operating frequency
B.Cut-off wavelength
C.Threshold frequency
D.Resonant frequency
- 2.
The stopping potential in a photoelectric experiment depends on which of the following properties of the incident light?
A.Intensity only
B.Frequency only
C.Both Intensity and Frequency
D.Neither Intensity nor Frequency
- 3.
If the intensity of light incident on a photosensitive surface is doubled, what happens to the photoelectric current?
A.It remains unchanged
B.It is doubled
C.It is halved
D.It becomes four times
Download the worksheet for Dual Nature of Radiation and Matter - Photoelectric Effect to practice offline. It includes additional chapter-level practice questions.
Einstein’s Photoelectric Equation
SubtopicEinstein’s Photoelectric Equation under Dual Nature of Radiation and Matter for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Light of frequency is incident on a metal with a threshold frequency of . What is the maximum kinetic energy of the emitted photoelectrons?
A.B.C.D. - 2.
The work function of a metal is defined as the minimum energy required to:
A.Ionize the metal atom completely
B.Release an electron from the metal surface
C.Increase the temperature of the metal by
D.Excite an electron to a higher energy level
- 3.
If the intensity of light incident on a photosensitive surface is doubled, while keeping the frequency constant, what happens to the stopping potential of the emitted electrons?
A.It becomes double
B.It becomes four times
C.It remains unchanged
D.It becomes half
Download the worksheet for Dual Nature of Radiation and Matter - Einstein’s Photoelectric Equation to practice offline. It includes additional chapter-level practice questions.
De Broglie Hypothesis
SubtopicDe Broglie Hypothesis under Dual Nature of Radiation and Matter for Grade 12 CBSE.
Preview questions (no answers)
- 1.
The Davisson-Germer experiment was the first to experimentally demonstrate:
A.The particle nature of light
B.The wave nature of electrons
C.The existence of the nucleus
D.The quantization of charge
- 2.
The de Broglie wavelength associated with an electron accelerated through a potential difference of is approximately:
A.B.C.D. - 3.
Which of the following statements correctly describes the nature of matter waves?
A.They are electromagnetic in nature
B.They are longitudinal mechanical waves
C.They represent the probability of finding a particle in space
D.They require a vacuum to travel
Download the worksheet for Dual Nature of Radiation and Matter - De Broglie Hypothesis to practice offline. It includes additional chapter-level practice questions.