ECAT Pre General Science Chapter 21 online mcq test with answers for Physics chapter 21 (Nuclear Physics)

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ECAT Physics Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	Radiation detector are used to	A. measure intensity of radiation B. measure energy of radiation C. difference between different types of radiation D. all the above
2	Neutron was disvovered by:	A. Rutherford in 1920 B. Chadwick in 1922 C. Bohr in 1913 D. Compton in 1927
3	Which of the following material has smaller has life	A. uranium B. polonium C. radium D. radian
4	The number if neutrons in the nucleus of ₉₂U²³⁵are	A. Infinite B. 92 C. 235 D. 143
5	γ-rays are	A. electrostatic waves B. electromagnetic waves C. heavy particles D. longitudinal waves
6	The diameter of an atom is of the order	A. 10^-125m B. 10^-11m C. 10^-10m D. 10^-9m
7	In radioactive decay, the new element which is formed due to the disintegration of original element is called	A. element B. daughter element C. parent element D. none of these
8	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
9	Radioactivity was discovered by	A. Rutherford B. Henri Becqureal C. Maxwell D. James Chadwick
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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ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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

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

Radioactivity is

Radiation detector are used to

The figure 1.007276μ shows the mass of an:

Mass of neutron is

The half life of radioactive substances depends upon

Which of these is not a radiation detector

Fraction of the decaying atoms per unit time is called

The number of isotopes of hydrogen are

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

Mass of proton is of order of

How many isotopes of helium are present?

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

Curie is a unit of

1 amu is equal to.

Structure of the nucleus was explained by

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

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

The unit of decay constant is:

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

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

The diameter of an atom is of the order

The unit of decay constant is

γ-rays behave like a particle because they explain the

When a nucleus emits an alpha particle, it atomic mass decreased by

U-238 present in the natural uranium is about:

The chemical properties of all the isotopes of an elements are

A mass spectrograph sort out

The chemical properties of an element depends upon the number of

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ECAT Physics Chapter 21 Important MCQ's

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