WB JEE
Physics
Previous Years Questions

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 $$... A point source of light is used in an experiment of photoelectric effects. If the distance between the source and the photoelectric surface is doubled... Electrons are emitted with kinetic energy T from a metal plate by an irradiation of light of intensity J and frequency v. Then, which of the following... ## MCQ (Single Correct Answer) A nucleus X emits a$$\beta $$-particle to produce a nucleus Y. If their atomic masses are Mx and My respectively, then the maximum energy of the$$\b...
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...
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...
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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