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

00:00
Question # 1

The time required for a radioactive material to decrease in active by one half is called

Question # 2

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 3

An alpha particle has a charge of

Question # 4

The unit of decay constant is

Question # 5

γ-rays behave like a particle because they explain the

Question # 6

When a nucleus emits an alpha particles, its charge number decreases by

Question # 7

The number if neutrons in the nucleus of 92U235are

Question # 8

Marie curie and Pierre curie discovered:

Question # 9

Radiation detector are used to

Question # 10

Which of the following material has smaller has life

Question # 11

The emission of radiations take place in elements, having charge number greater than

Question # 12

Structure of the nucleus was explained by

Question # 13

Mass of proton is

Question # 14

The range of particle depends upon the factor

Question # 15

Gamma rays consist of steam of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
2 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
3 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
4 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
5 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
6 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
7 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
8 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
9 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
10 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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