ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

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 # 2

Which of these is not a radiation detector

Question # 3

The nucleus/nuclei of hydrogen is/are:

Question # 4

Charge on neutron is

Question # 5

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 6

The amount of energy equivalent to 1 a.m.u is

Question # 7

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 8

Neutron was disvovered by:

Question # 9

The most abundant isotope of neon is

Question # 10

Neutron was suggested to be in the nucleus by:

Question # 11

The half lie of radium-226 is

Question # 12

How many isotopes of helium are present?

Question # 13

Examples of moderators used in a fission reactor is/are:

Question # 14

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 15

Gamma rays consist of steam of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
2 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
3 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
4 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
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 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
7 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
8 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
9 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
10 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these

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