ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

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

Curie is a unit of

Question # 2

The penetration power ofβ-particle is

Question # 3

The figure 1.007276μ shows the mass of an:

Question # 4

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

Question # 5

The rate of decay of a radioactive substance

Question # 6

Phenomenon of radioactivity is due to disintegration of

Question # 7

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

Question # 8

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

Question # 9

Radioactivity is

Question # 10

Rate of decay is actually described by.

Question # 11

The isotope/s of hydrogen is /are:

Question # 12

The half lie of radium-226 is

Question # 13

Charge on neutron is

Question # 14

The nucleus/nuclei of hydrogen is/are:

Question # 15

Gamma rays consist of steam of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
2 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
3 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
4 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
5 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 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
7 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
8 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
9 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
10 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2

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