ECAT Physics Chapter 21 Nuclear Physics

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

An alpha particle has a charge of

Question # 2

Pair production take place when energy ofγ-rays photon is

Question # 3

There is present in paraffin a large amount of:

Question # 4

A particle having the mass of electron and charge of a proton is called a

Question # 5

Proton was discovered by Rutherford in

Question # 6

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 7

The reciprocal of decay constant λ of a radioactive material is:

Question # 8

Which of these is not a radiation detector

Question # 9

The most abundant isotope of neon is

Question # 10

The unit of decay constant is

Question # 11

Heavy water is made of one oxygen atom and two atoms of:

Question # 12

Radioactivity was discovered by

Question # 13

Different radioactive material have

Question # 14

Nucleon means:

Question # 15

The distance travelled byα-particle in a medium before coming to rest, is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
2 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
3 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
4 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
5 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
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 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
8 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
9 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
10 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian

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