ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

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

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

Question # 2

Nucleon means:

Question # 3

Marie curie and Pierre curie discovered:

Question # 4

Nucleus consists of

Question # 5

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

Question # 6

The rate of decay of radioactive substance

Question # 7

The half lie of radium-226 is

Question # 8

The diameter of an atom is of the order

Question # 9

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

Question # 10

After alpha decay the atomic number of the atom

Question # 11

Neutron was discovered by

Question # 12

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 13

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

Question # 14

1 amu is equal to

Question # 15

The range ofβ-particle in air is greater than that ofα-particle by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
2 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
3 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
4 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
5 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
6 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
7 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
8 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
9 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
10 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity

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