ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

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

Try The 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

Different radioactive material have

Question # 2

The diameter of an atom is of the order

Question # 3

There is present in paraffin a large amount of:

Question # 4

The unit of decay constant is

Question # 5

Phenomenon of radioactivity is due to disintegration of

Question # 6

The most abundant isotope of neon is

Question # 7

How many isotopes of helium are present?

Question # 8

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 9

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

Question # 10

The energy acquired by a mass of 1g moving with the speed of light is

Question # 11

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

Question # 12

β-particles are easily deflected by collisions than heavy

Question # 13

Examples of moderators used in a fission reactor is/are:

Question # 14

Charge on neutron is

Question # 15

Neutrons are

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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 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
3 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
4 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
5 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
6 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
7 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
8 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
9 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
10 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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