ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

Proton was discovered by Rutherford in

Question # 2

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

Question # 3

After alpha decay the atomic number of the atom

Question # 4

Neutron was discovered by

Question # 5

A pair of quark and antiquark makes a:

Question # 6

Rutherford performed an experiment on nuclear reactions in:

Question # 7

Nucleon means:

Question # 8

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

Question # 9

The amount of energy equivalent to 1 a.m.u is

Question # 10

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

Question # 11

Curie is a unit of

Question # 12

A mass spectrograph sort out

Question # 13

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

Question # 14

Charge on neutron is

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
2 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
3 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
4 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
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 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
7 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
8 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
9 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
10 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these

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