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Chapters
2: Mechanical Properties of fluids
3: Kinetic Theory of gases and Radiation
4: Thermodynamics
5: Oscillations
6: Superposition of Waves
7: Wave Optics
8: Electrostatics
9: Current Electricity
10: Magnetic Effect of Electric Current
11: Magnetic materials
12: Electromagnetic Induction
13: AC Circuits
▶ 14: Dual Nature Of Radiation And Matter
15: Structure of Atoms and Nuclei
16: Semiconductors Devices
![SCERT Maharashtra solutions for Physics [English] 12 Standard HSC chapter 14 - Dual Nature Of Radiation And Matter - Shaalaa.com](/images/physics-english-12-standard-hsc_6:5f2b1b2038084cf381bfa42c826a928c.jpg "SCERT Maharashtra solutions for Physics [English] 12 Standard HSC chapter 14 - Dual Nature Of Radiation And Matter")
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Solutions for Chapter 14: Dual Nature Of Radiation And Matter
Below listed, you can find solutions for Chapter 14 of Maharashtra State Board SCERT Maharashtra for Physics [English] 12 Standard HSC.
SCERT Maharashtra solutions for Physics [English] 12 Standard HSC 14 Dual Nature Of Radiation And Matter MCQ’S
1 Mark Each
The electrons are emitted in the photoelectric effect from a metal surface.
only if the frequency of radiation is above a certain threshold value.
only if the temperature of the surface is high.
at the that is independent of the nature of metal.
with a maximum velocity proportional to the frequency of incident radiation
As the intensity of incident light increases ______
photoelectric current increases
photoelectric current decreases.
the kinetic energy of emitted photoelectrons increases
the kinetic energy of emitted photoelectrons decreases.
The maximum kinetic energy of the photoelectrons depends only on ______
potential
frequency
incident angle
pressure
According to De-Broglie, the waves are associated with ______
moving neutral particles only.
moving charged particle only.
electrons only
all moving matter particles
The work function of a metal is 4.2 eV. Its threshold wavelength will be ______.
4000 Å
3500 Å
2959 Å
2500 Å
Ultraviolet radiation of 6.2 eV falls on an aluminum surface (work function 4.2 eV). The kinetic energy in joules of the fastest electron emitted is ______
3.2 × 10-21
3.2 × 10-19
3.2 × 10-1
3.2 × 10-15
Planck's constant is 6.6 × 10-34 Js. The momentum of each photon is given radiation Is 3.3 × 10-29 kg/s. The λ of radiation is ______.
2 × 1010 m
2 × 107 m
2 × 105 m
2 × 10-5 m
SCERT Maharashtra solutions for Physics [English] 12 Standard HSC 14 Dual Nature Of Radiation And Matter Very Short Answer
1 Mark Each
Define photoelectric effect.
Define threshold frequency.
What is cut-off or stopping potential?
Define the work function of the metal.
The minimum frequency for photoelectric effect on metal is 7 × 1014 Hz, Find the work function of the metal.
Find the kinetic energy of the emitted electron, if in photoelectric effect energy of incident Photon is 4 eV and work function is 2.4 eV.
Find the energy of photon which have momentum 2 × 10-16 gm-cm/sec.
SCERT Maharashtra solutions for Physics [English] 12 Standard HSC 14 Dual Nature Of Radiation And Matter Short Answer I
2 Marks Each
Explain the term ‘wave-particle duality' of matter.
Draw a neat labelled diagram of a schematic of the experimental setup for the photoelectric effect.
What is mean by the dual nature of matter?
Explain the concept of the photoelectric effect.
If the total energy of radiation of frequency 1014 Hz is 6.63 J, Calculate the number of photons in the radiation.
An electron is accelerated through a potential of 120 V. Find its de Broglie wavelength.
Calculate the stopping potential when the metal with the work function 0.6 eV is illuminated with the light of 2 eV.
SCERT Maharashtra solutions for Physics [English] 12 Standard HSC 14 Dual Nature Of Radiation And Matter Short Answer II
3 Marks Each
State Einstein photoelectric equation.
Explain two characteristics of the photoelectric effect on the basis of Einstein’s photoelectric equation.
With the help of a circuit diagram describing an experiment to study the photoelectric effect.
What is the photoelectric effect? Define stopping potential and photoelectric work function.
Calculate De Broglie's wavelength of the bullet moving with speed 90m/sec and having a mass of 5 gm.
The energy of a photon is 2 eV. Find its frequency and wavelength.
The work function of a surface is 3.1 eV. A photon of frequency 1 × 1015 Hz. Is an incident on it. Calculate the incident wavelength is photoelectric emission occurs or not.
SCERT Maharashtra solutions for Physics [English] 12 Standard HSC 14 Dual Nature Of Radiation And Matter Long Answer
4 Marks Each
With the help of a circuit diagram describe the experiment to study the characteristics of the photoelectric effect. Hence discuss any 2 characteristics of the photoelectric effect.
State Einstein’s photoelectric equation. Explain all characteristics of the photoelectric effect, on the basis of Einstein’s photoelectric equation.
Explain De Broglie’s Hypothesis.
Solutions for 14: Dual Nature Of Radiation And Matter
SCERT Maharashtra solutions for Physics [English] 12 Standard HSC chapter 14 - Dual Nature Of Radiation And Matter
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Concepts covered in Physics [English] 12 Standard HSC chapter 14 Dual Nature Of Radiation And Matter are Overview: Dual Nature of Radiation and Matter, Dual Nature of Radiation and Matter, The Photoelectric Effect, Wave-particle Duality of Electromagnetic Radiation, Photo Cell, De Broglie Hypothesis, Wave-particle Duality of Matter, Davisson and Germer Experiment.
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