Atoms and Nuclei-Mass-Energy Relation (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 1 - 4 of 5

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 1

» Atoms and Nuclei » Mass-Energy Relation

MCQ▾

Question

If mass equivalent to one mass of electron is completely converted into energy then determine the energy liberated.

Choices

Choice (4) Response

a.

0.51 MeV

b.

2.12 MeV

c.

3.12 MeV

d.

1.51 MeV

Question number: 2

» Atoms and Nuclei » Mass-Energy Relation

MCQ▾

Question

On disintegration of one atom of U 235 the amount of energy obtained is 200 MeV. The power obtained in a reactor is 1000 KW. Then

(1) Atoms disintegrated per second in reactor is 3.125 ⨯ 10 16

(2) Atoms disintegrated per second in reactor is 3.125 ⨯ 10 18

(3) Decay in mass per hour is 4 ⨯ 10 -8 kg

(4) Decay in mass per hour is 4 ⨯ 10 -6 kg

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

Question number: 3

» Atoms and Nuclei » Mass-Energy Relation

MCQ▾

Question

Energy of each photon obtained in the pair production process will be, if the mass of electron or positron is Equation a. m. u-

Choices

Choice (4) Response

a.

0.213 MeV

b.

0.465 MeV

c.

0.123 MeV

d.

0.321 MeV

Question number: 4

» Atoms and Nuclei » Mass-Energy Relation

MCQ▾

Question

Sun radiate energy in all direction. The average energy received at earth is 1.4 KW/m 2. The average distance between the earth and the sun is 1.5 ⨯ 10 n m. If this energy is released by conservation of mass into energy, then the mass lost per day by the sun is approximately (Use l day = 86400 sec)

Choices

Choice (4) Response

a.

3.8 ⨯ 10 14 kg.

b.

7.6 ⨯ 10 14 kg

c.

3.8 ⨯ 10 12 kg

d.

4.4 ⨯ 10 9 kg

f Page
Sign In