AP EAPCET 2024 - 19th May Evening Shift | Atoms and Nuclei Question 9 | Physics

The decrease in each day in the uranium mass of the material in a uranium reactor operating at a power of 12 MW is (Energy released in one ${ }_{92} \mathrm{U}^{235}$ fission is about 200 MeV )

$12.64 \times 10^{-2} \mathrm{~kg}$

$11.50 \times 10^{-2} \mathrm{~g}$

12.64 kg

12.64 g

AP EAPCET 2024 - 18th May Morning Shift

MCQ (Single Correct Answer)

-0

If the binding energy of the electron in a hydrogen atom is 13.6 eV . Then, energy required to remove electron from first excited state of $\mathrm{Li}^{2+}$ is

122.4 eV

3.4 eV

13.6 eV

30.6 eV

AP EAPCET 2024 - 18th May Morning Shift

MCQ (Single Correct Answer)

-0

A mixture consists of two radioactive materials $A_1$ and $A_2$ with half lives of 20 s and 10 s respectively. Initially, the mixture has 40 g of $A_1$ and 160 g of $A_2$. The amount of the two in the mixture will become equal after

60 s

80 B

20 s

408

AP EAPCET 2022 - 5th July Morning Shift

MCQ (Single Correct Answer)

-0

An electron in the hydrogen atom excites from 2nd orbit to 4th orbit then the change in angular momentum of the electron is (Planck's constant $$h=6.64 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$)

$$2.11 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$

$$1.05 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$

$$0.57 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$

$$422 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$

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