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Chapter 18 Atomic and Nuclear Physics-28
1.
What is the temperature at the centre of the Sun?
a) 20 million Fahrenheit
b) 20 million Celsius
c) 20 million Kelvin
d) 2 billion Celsius
2.
The equation E = mc2 was given by the scientist?
a) Ohm
b) Einstein
c) Bohr
d) Otto Hahn
3.
How many helium nuclei are formed by the fusion of four hydrogen nuclei at the sun?
a) 3
b) 1
c) 25.7
d) 2
4.
How many positrons are formed by the fusion of four hydrogen nuclei at the sun?
a) 2
b) 3
c) 1
d) 25.7
5.
How much energy is released during the fusion of four hydrogen nuclei at the sun?
a) 25.7 M eV
b) 1 M eV
c) 3 M eV
d) 2 M eV
6.
Which of the following is the harmful effect on human beings due to large doses or prolonged small doses of radiations?
a) Yellowish of the skin
b) Heart attack
c) Redness of the skin
d) Heart cancer
7.
Which of the following is the harmful effect on human beings due to large doses or prolonged small doses of radiations?
a) Heart attack
b) Yellowish of the skin
c) Heart cancer
d) Sores on the skin
8.
What is effect of radiation burns?
a) (c) Redness of the skin
b) (d) Yellowish of the skin
c) (a) Both b and c
d) (b) Sores on the skin
9.
Which of the following is the harmful effect on human beings due to large doses or prolonged small doses of radiations?
a) Heart attack
b) Yellowish of the skin
c) Sterility
d) Heart cancer
10.
How many alpha particles are formed by the fusion of four hydrogen nuclei at the sun?
a) 25.7
b) 3
c) 2
d) 1
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