MDCAT Physics Chapter 16 MCQ Test With Answer for (Nuclear Physics)

MCQ's Test For MDCAT Physics Chapter 16 Nuclear Physics MCQ's Test

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MDCAT Physics Chapter 16 Nuclear Physics MCQ's Test

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Question # 1

When a radioactive nucleus emits a 𝖰 −paritcles, the mass number of the atom:

Question # 2

A count rate 240 per minute reduces to 30 counts per min in 1 hour. The half-life of source is:

Question # 3

If the radioactive substance reduces to 𝟏 𝟏𝟔 PHYSICS of its original mass in 40 days then its half-life is:

Question # 4

During a negative β-decayv

Question # 5

The most penetrating radiations out of the following is that of

Question # 6

In nuclear fission reaction, when the products are 140X and 94Sr, the number of neutrons emitted is

Question # 7

The more readily fissionable isotope of uranium has an atomic mass of:

Question # 8

During a negative β-decay

Question # 9

The fusion of hydrogen into helium is more likely to take place:

Question # 10

When the radioactive nucleus emits a beta particle, the proton neutron ration:

Question # 11

The binding energy per nucleon is:

Question # 12

Which row is correct for fission and for fusion?

Question # 13

In 420 days, the activity of a sample of polonium (Po) fell to one-eight of its initial value. The half-life of polonium is :

Question # 14

The rate of decay radioactive substance:

Question # 15

The half-life of a radioactive element which has only 1//32 of its original mass left after a lapse of 60 days is:

Question # 16

The example of nuclear fusion is:

Question # 17

Nuclear fission experiments show that the neutrons the uranium nuclei into two fragment of about the same size. This process is accompanied by the emission of several:

Question # 18

A thorium nucleus is formed when a uranium nucleus emits an 𝑎 −particles. Atomic number of thorium is :

Question # 19

In an 𝑎 −decay:

Question # 20

Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:

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MCAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When a radioactive nucleus emits a 𝖰 −paritcles, the mass number of the atom:
A. Increases by one
B. Decreases by one
C. Remains the same
D. Decreases by four
2 A count rate 240 per minute reduces to 30 counts per min in 1 hour. The half-life of source is:
A. 20min
B. 60min
C. 80min
D. 90min
3 A thorium nucleus is formed when a uranium nucleus emits an 𝑎 −particles. Atomic number of thorium is :
A. 23
B. 60
C. 90
D. 70
4 The number of electrons in a nucleus X of atomic number Z and mass number A is:
A. A
B. W
C. Z
D. Y
5 The rate of decay radioactive substance:
A. Is constant
B. Decrease exponentially with time
C. Varies inversely with time
D. Decrease linearly with time
6 The phenomenon of radioactivity is associated with:
A. Fission of nucleus
B. Disintegration of neutrons
C. Emission of spectral lines
D. Spontaneous disintegration of the nuclei of atoms
7 In an 𝑎 −decay:
A. The parent and daughter nuclei have same number of protons
B. The daughter nucleus has one proton more than parent nucleus
C. The daughter nucleus has two protons less than parent nucleus
D. The daughter nucleus has two neutrons more than parent nucleus
8 Which of the following have maximum ionization power?
A. 𝛼 −rays
B. 𝛽 −rays
C. 𝛾 −rays
D. Same for all
9 When a radioactive nucleus remits a beta particle, the proton neutron ratio:
A. Decreases
B. Increases
C. Remain same
D. None of the above
10 A radioactive substance has a half-life of 4 months. Three-fourths of the substance will decay in:
A. 5months
B. 6months
C. 8months
D. 7months

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