1

BITSAT 2023

MCQ (Single Correct Answer)

+3

-1

The total energy of an electron in the second excited state of hydrogen atom is about $$-1.51 \mathrm{~eV}$$. Its kinetic energy in this state is

2

BITSAT 2023

MCQ (Single Correct Answer)

+3

-1

After two hours one-eight of the starting amount of a certain radioactive isotope remained undecayed. The half-life of the isotope is

3

BITSAT 2022

MCQ (Single Correct Answer)

+3

-1

In a radioactive material the activity at time t_{1}, is A_{1} and at a later time t_{2}, it is A_{2}. If the decay constant of the material is $$\lambda$$, then

4

BITSAT 2021

MCQ (Single Correct Answer)

+3

-1

A proton has kinetic energy E = 100 eV which is equal to that of a photon. The wavelength of photon is $$\lambda$$_{2} and that of proton is $$\lambda$$_{1}. The ratio $${{{\lambda _2}} \over {{\lambda _1}}}$$ is proportional to

Questions Asked from Atoms and Nuclei (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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