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

Proton was discovered by Rutherford in

Question # 2

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 3

Curie is a unit of

Question # 4

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

Question # 5

Which of the following material has smaller has life

Question # 6

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

Question # 7

Mass of proton is

Question # 8

The half lie of radium-226 is

Question # 9

The number of all the protons and neutrons in a nucleus is known as

Question # 10

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

Question # 11

The chemical properties of all the isotopes of an elements are

Question # 12

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

Question # 13

In wilson cloud chamber, the air becomes saturated with:

Question # 14

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 15

Radioactivity is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
2 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
3 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
4 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
5 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
6 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
7 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
8 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
9 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
10 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives

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