ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Structure of the nucleus was explained by

Question # 2

When certain nucleus emits aβ-particles, is mass number:

Question # 3

The half life of radioactive substances depends upon

Question # 4

The time required for a radioactive material to decrease in active by one half is called

Question # 5

The energy acquired by a mass of 1g moving with the speed of light is

Question # 6

Binding energy per nucleus is

Question # 7

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 8

Neon gas have three isotopes whose atomic numbers are

Question # 9

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 10

Radioactivity was discovered by:

Question # 11

The number if neutrons in the nucleus of 92U235are

Question # 12

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 13

A curie represents a very strong source of

Question # 14

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 15

Nuclei that have the same charge number but different mass number are called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
4 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
5 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
6 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
7 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
8 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
9 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
10 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus

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