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

The reciprocal of decay constant λ of a radioactive material is:

Question # 2

Mass of neutron is

Question # 3

The chemical behaviour of an atom is determined by

Question # 4

According to Rutherford atomic model, the positive charge in an atom

Question # 5

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

Question # 6

When certain nucleus emits anα particle, its mass number:

Question # 7

In wilson cloud chamber, the air becomes saturated with:

Question # 8

Radioactivity

Question # 9

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

Question # 10

The total charge of any nucleus is given as

Question # 11

Radioactivity is

Question # 12

A mass spectrograph sort out

Question # 13

Neutron was discovered by

Question # 14

Rate of decay is actually described by.

Question # 15

Radioactivity was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
2 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
3 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
4 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
5 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
6 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
7 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
8 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
9 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
10 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV

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