Dual Nature of Radiation · Physics · WB JEE

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MCQ (More than One Correct Answer)

WB JEE 2021
Electric field component of an EM radiation varies with time as E = a (cos$$\omega$$0t + sin$$\omega$$t cos$$\omega$$0t), where a is a constant and $$...
WB JEE 2020
A point source of light is used in an experiment of photoelectric effects. If the distance between the source and the photoelectric surface is doubled...
WB JEE 2019
Electrons are emitted with kinetic energy T from a metal plate by an irradiation of light of intensity J and frequency v. Then, which of the following...

MCQ (Single Correct Answer)

WB JEE 2020
A nucleus X emits a $$\beta $$-particle to produce a nucleus Y. If their atomic masses are Mx and My respectively, then the maximum energy of the $$\b...
WB JEE 2020
For nuclei with mass number close to 119 and 238, the binding energies per nucleon are approximately 7.6 MeV and 8.6 MeV, respectively. If a nucleus o...
WB JEE 2019
A parent nucleus X undergoes $$\alpha$$-decay with a half-life of 75000 yrs. The daughter nucleus Y undergoes $$\beta$$-decay with a half-life of 9 mo...
WB JEE 2017
When light of frequency v1 is incident on a metal with work function W (where hv1 > W), then photocurrent falls to zero at a stopping potential of ...
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