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 energy acquired by a mass of 1g moving with the speed of light is	A. 3 x 10⁸J B. 9 x 10¹³J C. 3 x 10¹³J D. 9 x 10¹⁶J
2	When a nucleus emits an alpha particle, it atomic mass decreased by	A. 2 B. 1 C. 4 D. 3
3	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
4	The half lie of radium-226 is	A. 238 years B. 4.5 x 10⁹days C. 1620 years D. 332 years
5	The counter, which also provides the power to the G.M. tube is called:	A. Thin mica window B. thin glass window C. Airy window D. Wooden window
6	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
7	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
8	Marie curie and Pierre curie discovered:	A. Uranium B. Polonium C. Radium D. Both (A) and (C)
9	If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by	A. -4 B. 4 C. 2 D. 1
10	Which of these is not a radiation detector	A. Wilson cloud chamber B. cyclotron acceleration C. Geiger Miller counter D. solid state detector

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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

When certain nucleus emits anα particle, its mass number:

Neutrons are

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Which of the following material has smaller has life

The number of isotopes of hydrogen are

The total charge of any nucleus is given as

Alfa particles are

Nuclei that have the same charge number but different mass number are called

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

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

The rate of decay of radioactive substance

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

Which of these is not a radiation detector

Radioactivity was discovered by

The energy is found from Einstein's mass energy relation is called

Beta particles are

In wilson cloud chamber, the air becomes saturated with:

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

The half life of radioactive substances depends upon

Neutron was discovered by

U-238 present in the natural uranium is about:

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

Nucleus consists of

β-particles are easily deflected by collisions than heavy

The range of particle depends upon the factor

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

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

After alpha decay the atomic number of the atom

How much time, theα-particle more massive than an electron

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

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