Dual Nature of Radiation · Physics · JEE Advanced

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Numerical

JEE Advanced 2023 Paper 2 Online
In a radioactive decay process, the activity is defined as $A=-\frac{d N}{d t}$, where $N(t)$ is the number of radioactive nuclei at time $t$. Two rad...
JEE Advanced 2023 Paper 1 Online
A Hydrogen-like atom has atomic number $Z$. Photons emitted in the electronic transitions from level $n=4$ to level $n=3$ in these atoms are used to p...
JEE Advanced 2022 Paper 1 Online
The minimum kinetic energy needed by an alpha particle to cause the nuclear reaction ${ }_{7}^{16} \mathrm{~N}+$ ${ }_{2}^{4} \mathrm{He} \rightarrow{...
JEE Advanced 2021 Paper 2 Online
In a photoemission experiment, the maximum kinetic energies of photoelectrons from metals P, Q and R are EP, EQ and ER, respectively, and they are rel...
JEE Advanced 2019 Paper 2 Offline
A perfectly reflecting mirror of mass M mounted on a spring constitutes a spring-mass system of angular frequency $$\Omega $$ such that $${{4\pi M\Ome...
JEE Advanced 2018 Paper 2 Offline
In a photoelectric experiment a parallel beam of monochromatic light with power of $$200$$ $$W$$ is incident on a perfectly absorbing cathode of work ...
JEE Advanced 2013 Paper 1 Offline
The work functions of silver and sodium are 4.6 and 2.3 eV, respectively. The ratio of the slope of the stopping potential versus frequency plot for s...
IIT-JEE 2011 Paper 1 Offline
The activity of a freshly prepared radioactive sample is 1010 disintegrations per second, whose mean life is 109 s. The mass of an atom of this radioi...
IIT-JEE 2011 Paper 2 Offline
A silver sphere of radius 1 cm and work function 4.7 eV is suspended from an insulating thread in free-space. It is under continuous illumination of 2...
IIT-JEE 2010 Paper 1 Offline
An $$\alpha$$-particle and a proton are accelerated from the rest by a potential difference of 100 V. After this, their de Broglie wavelengths are $$\...

MCQ (Single Correct Answer)

JEE Advanced 2022 Paper 2 Online
When light of a given wavelength is incident on a metallic surface, the minimum potential needed to stop the emitted photoelectrons is $6.0 \mathrm{~V...
JEE Advanced 2017 Paper 2 Offline
A photoelectric material having work-function $${\phi _0}$$ is illuminated with light of wavelength $$\lambda \left( {\lambda < {{he} \over {{\phi...
JEE Advanced 2016 Paper 1 Offline
In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoel...
JEE Advanced 2014 Paper 2 Offline
A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to thes...
JEE Advanced 2013 Paper 1 Offline
A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30 mW and the speed of light is ...
IIT-JEE 2009 Paper 2 Offline
Photoelectric effect experiments are performed using three different metal plates p, q and r having work functions $$\phi_p=2.0~\mathrm{eV}$$, $$\phi_...
IIT-JEE 2009 Paper 1 Offline
The allowed energy for the particle for a particular value of $$n$$ is proportional to
IIT-JEE 2009 Paper 1 Offline
If the mass of the particle is $$m=1.0\times10^{-30}$$ kg and $$a=6.6$$ nm, the energy of the particle in its ground state is closest to

MCQ (More than One Correct Answer)

JEE Advanced 2021 Paper 2 Online
A heavy nucleus N, at rest, undergoes fission N $$\to$$ P + Q, where P and Q are two lighter nuclei. Let $$\delta$$ = MN $$-$$ MP $$-$$ MQ, where MP, ...
JEE Advanced 2021 Paper 1 Online
Which of the following statement(s) is(are) correct about the spectrum of the hydrogen atom?
JEE Advanced 2016 Paper 2 Offline
Light of wavelength $$\lambda$$ph falls on a cathode plate inside a vacuum tube as shown in the figure. The work function of the cathode surface is $$...
JEE Advanced 2015 Paper 1 Offline
For photo-electric effect with incident photon wavelength $$\lambda$$, the stopping potential is V0. Identify the correct variation(s) of V0 with $$\l...
JEE Advanced 2013 Paper 2 Offline
Using the expression $$2d\sin \theta = \lambda $$, one calculates the values of d by measuring the corresponding angles $$\theta $$ in the range 0 to...
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