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

β-particles are easily deflected by collisions than heavy

Question # 2

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

Question # 3

A pair of quark and antiquark makes a:

Question # 4

Neutron was discovered in

Question # 5

In radio-active decay, the original element which disintegrate to another element is called

Question # 6

The chemical behaviour of an atom is determined by

Question # 7

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 8

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 9

Radioactivity is

Question # 10

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 # 11

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

Question # 12

The half life of radioactive substances depends upon

Question # 13

The nucleus left after the emission of some radiation is called:

Question # 14

Which of these is not a radiation detector

Question # 15

There is present in paraffin a large amount of:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
2 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
3 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
4 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
5 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
6 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
7 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
8 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
9 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
10 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window

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