Answer the following.
What is ‘Pair production’?
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Dual Nature of Radiation and Matter - ISC Class 12 Physics Questions with Answers, Page 3
63 past-paper questions on Dual Nature of Radiation and Matter from ISC Class 12 Physics papers (2027-2018), newest first, in full. Questions 41-60 are on this page, 20 to a page. Tap "Show answer" under a question to see its answer.
Nothing matches. Try fewer letters.
Choose the correct option.
The de-Broglie wavelength ($\lambda$) associated with a moving electron having kinetic energy ($E$) is given by:
- (a)$\frac{2h}{\sqrt{2mE}}$
- (b)$\frac{2\sqrt{2mE}}{h}$
- (c)$\frac{h}{\sqrt{2mE}}$
- (d)$\sqrt{2mhE}$
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Draw the graph described below.
State how will you use this graph to determine the value of Planck’s constant.
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Draw the graph described below.
With reference to photoelectric effect, plot a labelled graph of stopping potential ($V_s$) versus frequency ($f$) of the incident radiation.
Draw: graph of stopping potential (Vs) versus frequency (f) of incident radiation
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Choose the correct option.
Matter waves are:
- (a)waves associated with moving particles.
- (b)waves associated with stationary particles.
- (c)waves associated with any charged particles.
- (d)waves associated with electrons only.
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Solve the following.
Monochromatic light of wavelength $396\text{ nm}$ is incident on the surface of a metal whose work function is $1\cdot125\text{ eV}$. Calculate:
(i)[1.5]
the energy of an incident photon in $\text{eV}$.
(ii)[1.5]
the maximum kinetic energy of photoelectrons in $\text{eV}$.
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Choose the correct option.
The graph of de-Broglie wavelength ($\lambda$) of a moving electron versus its velocity ($v$) is:
- (a)(a)
- (b)(b)
- (c)(c)
- (d)(d)
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Which of the following graphs correctly represents the variation of maximum kinetic energy ($E_k$) of photoelectrons with the frequency ($\nu$) of the incident radiation?
- (a)
- (b)
- (c)
- (d)
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Solve the following.
Calculate maximum kinetic energy of photoelectrons emitted by a metal (work function = $1\cdot5\text{ eV}$) when it is illuminated with light of wavelength $198\text{ nm}$.
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Solve the following.
Find the de Broglie wavelength of electrons moving with a speed of $7 \times 10^6\text{ ms}^{-1}$.
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Answer the following.
State de Broglie hypothesis.
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In photoelectric effect experiment, the slope of the graph of the stopping potential versus frequency gives the value of:
- (a)$\frac{h}{e}$
- (b)$h$
- (c)$\frac{e}{h}$
- (d)$\frac{hc}{e}$
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Answer the following.
What conclusion can be drawn from Davisson and Germer’s experiment?
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Answer the following.
What is Pair production?
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Choose the correct option.
The energy associated with light of which of the following colours is minimum:
- (a)violet
- (b)red
- (c)green
- (d)yellow
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Answer the following.
Stopping potential ($V_s$)
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Answer the following.
Threshold frequency ($f_0$)
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Answer the following.
State de Broglie hypothesis.
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Choose the correct option.
Einstein’s photoelectric equation is:
- (a)$E_{\max} = h\lambda - \varphi_0$
- (b)$E_{\max} = \frac{hc}{\lambda} - \varphi_0$
- (c)$E_{\max} = h\nu + \varphi_0$
- (d)$E_{\max} = \frac{hc}{\lambda} + \varphi_0$
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Answer the following.
With reference to photoelectric effect, define threshold wavelength.
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