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

00:00
Question # 1

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 2

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

Question # 3

Mass of neutron is

Question # 4

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 # 5

Binding energy per nucleus is

Question # 6

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

Question # 7

β-particles are easily deflected by collisions than heavy

Question # 8

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

Question # 9

The isotope/s of hydrogen is /are:

Question # 10

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 11

According to Rutherford atomic model, the positive charge in an atom

Question # 12

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

Question # 13

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

Question # 14

The energy is found from Einstein's mass energy relation is called

Question # 15

An alpha particle has a charge of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
2 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
3 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
4 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
5 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
6 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
7 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
8 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
9 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
10 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A

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