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### Physics

#### Previous Years Questions

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When light of a given wavelength is incident on a metallic surface, the minimum potential needed to stop the emitted pho...
JEE Advanced 2022 Paper 2 Online
A photoelectric material having work-function $${\phi _0}$$ is illuminated with light of wavelength $$\lambda \left( {\l... JEE Advanced 2017 Paper 2 Offline In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wav... JEE Advanced 2016 Paper 1 Offline A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoe... JEE Advanced 2014 Paper 2 Offline A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30... JEE Advanced 2013 Paper 1 Offline ## Numerical More The minimum kinetic energy needed by an alpha particle to cause the nuclear reaction { }_{7}^{16} \mathrm{~N}+ { }_{2... JEE Advanced 2022 Paper 1 Online In a photoemission experiment, the maximum kinetic energies of photoelectrons from metals P, Q and R are EP, EQ and ER, ... JEE Advanced 2021 Paper 2 Online A perfectly reflecting mirror of mass M mounted on a spring constitutes a spring-mass system of angular frequency$$\Ome...
JEE Advanced 2019 Paper 2 Offline
In a photoelectric experiment a parallel beam of monochromatic light with power of $$200$$ $$W$$ is incident on a perfec...
JEE Advanced 2018 Paper 2 Offline
The work functions of silver and sodium are 4.6 and 2.3 eV, respectively. The ratio of the slope of the stopping potenti...
JEE Advanced 2013 Paper 1 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 unde...
IIT-JEE 2011 Paper 2 Offline
The activity of a freshly prepared radioactive sample is 1010 disintegrations per second, whose mean life is 109 s. The ...
IIT-JEE 2011 Paper 1 Offline
An $$\alpha$$-particle and a proton are accelerated from the rest by a potential difference of 100 V. After this, their ...
IIT-JEE 2010 Paper 1 Offline

## MCQ (More than One Correct Answer)

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

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