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	The range of particle depends upon the factor	A. charge, mass and energy of particle B. density of medium C. ionization potential of the atoms D. all the above
2	The rate of decay of radioactive substance	A. is constant B. decrease exponentially with time C. varies inversely as time D. decreases linearly with time
3	After alpha decay the atomic number of the atom	A. increase by four B. decreases by two C. increases by two D. decrease by four
4	Neutron was discovered by	A. Curie B. Roentgen C. Chadwick D. Rutherford
5	Maric Curie and Pieree Curie discovered two new radioactive elements, which are called	A. polonium uranium B. uranium and radium C. polonium and radium D. none of these
6	For an atom having atomic number Z and atomic weight A, the charge on the nucleus is	A. A - Z B. A + Z C. Z D. A
7	Alfa , beta and gamma rays are emitted from a radio-active substance	A. spontaneously B. when it is heated C. when it is exposed to light D. When it interacts with the other particle
8	The half life of radioactive substances depends upon	A. amount of substance B. energy of substance C. state of substance D. temperature of substance
9	Fraction of the decaying atoms per unit time is called	A. decay atom B. decay element C. decay constant D. decay
10	How much time, theα-particle more massive than an electron	A. 600 B. 7000 C. 5000 D. 15000

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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

Charge on proton is

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

β-particles are easily deflected by collisions than heavy

Structure of the nucleus was explained by

The isotope/s of hydrogen is /are:

A curie represents a very strong source of

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

Which of these is not a radiation detector

During the nuclear changes, the law/s of conservation that hold/s are that of:

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

The rate of decay of radioactive substance

Mass of neutron is

Binding energy per nucleus is

Beta particles are

Neutron was discovered in

Three quarks make:

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

The chemical properties of all the isotopes of an elements are

When certain nucleus emits anα particle, its mass number:

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

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

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

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

Neutron was disvovered by:

Radioactivity was discovered by:

Neon gas have three isotopes whose atomic numbers are

The nucleus left after the emission of some radiation is called:

In 1932 Chadwick discovered

Neutron was suggested to be in the nucleus by:

Phenomenon of radioactivity is due to disintegration of

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ECAT Physics Chapter 21 Important MCQ's

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