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	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
2	Examples of moderators used in a fission reactor is/are:	A. Water B. Heavy water C. Carbon D. Hydrocarbon
3	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
4	The distance travelled byα-particle in a medium before coming to rest, is called	A. range ofγ-particle B. range of neutrons C. range of particle D. none of these
5	Which of these is not a radiation detector	A. Wilson cloud chamber B. cyclotron acceleration C. Geiger Miller counter D. solid state detector
6	An alpha particle has a charge of	A. +2e B. -2e C. -e D. +3e
7	β-particles are easily deflected by collisions than heavy	A. α-particles B. β-particles C. γ-particles D. none of these
8	Which of the following material has smaller has life	A. uranium B. polonium C. radium D. radian
9	In his experiment on nuclear reactions, Rutherford bombardedα particles on:	A. Nitrogen B. Hydrogen C. Lead D. Oxygen
10	The unit of decay constant is:	A. Second B. Metre C. Hour D. Year

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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

Structure of the nucleus was explained by

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

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Radiation detector are used to

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

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

There is present in paraffin a large amount of:

β-particles are easily deflected by collisions than heavy

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

The chemical behaviour of an atom is determined by

In 1932 Chadwick discovered

When certain nucleus emits aβ-particles, is mass number:

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

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

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

Radioactivity is

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

U-238 present in the natural uranium is about:

Which of the following material has smaller has life

γ-rays behave like a particle because they explain the

The nucleus/nuclei of hydrogen is/are:

Mass of neutron is

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Radioactivity was discovered by:

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Rate of decay is actually described by.

The figure 1.007276μ shows the mass of an:

Neutrons are

The half life of uranium-238 is

The number of protons inside a nucleus is called

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ECAT Physics Chapter 21 Important MCQ's

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