ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

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

Question # 3

There is present in paraffin a large amount of:

Question # 4

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

Question # 5

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

Question # 6

After alpha decay the atomic number of the atom

Question # 7

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

Question # 8

Phenomenon of radioactivity is due to disintegration of

Question # 9

The counter, which also provides the power to the G.M. tube is called:

Question # 10

The number if neutrons in the nucleus of 92U235are

Question # 11

Marie curie and Pierre curie discovered:

Question # 12

Nucleus consists of

Question # 13

Radioactivity was discovered by

Question # 14

Radioactivity was discovered by:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
2 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
3 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
4 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
5 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
6 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
7 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
8 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
9 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
10 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C

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