10th Science Unit 6 NUCLEAR PHYSICS Free Online Test

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1. Man made radioactivity is also known as............

1 point

a) Induced radioactivity

b) Spontaneous radioactivity

c) Artificial radioactivity

d) a & c

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2. Unit of radioactivity is...........

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a) roentgen

b) curie

c) Becquerel

d) all the above

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3. Artificial radioactivity was discovered by ...................

1 point

a) Becquerel

b) Irene Curie

c) Roentgen

d) Neils Bohr

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4. In which of the following, no change in mass number of the daughter nuclei takes placei) a decay ; ii) β decay ; ii) γ decay ; iv) neutron decay

1 point

a) i is correct

b) ii & iii are correct

c) I & iv are correct

d) ii & iv are correct

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5. ................isotope is used for the treatment of cancer.

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a) Radio iodine

b) Radio Cobalt

c) Radio Carbon

d) Radio Nickel

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6. Gamma rediations are dangerious because

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a) it affects eyes & bones

b) it affects tissues

c) it produces genetic disorder

d) it produces enormous amount of heat

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7. ...............aprons are used to protect us from gamma radiations.

1 point

a) lead oxide

b) Iron

c) Lead

d) Aluminium

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8. Which of the following statements is are correct?i) α particles are photonsii) Penetrating power of γ radiation is very low.iii) Ionization power is maximum for α rays.iv) Penetrating power of γ radiation is very high.

1 point

a) i & ii are correct

b) ii & iii are correct

c) iv only correct

d) iii & iv are correct

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9. Kamini reactor is located at...................

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a) Kalpakkam

b) Koodankulam

c) Mumbai

d) Rajasthan

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10. The Control rod in a nuclear reactor is made of

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a) uranium

b) cadmium

c) graphite

d) plutonium

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11. the explosion of the atomic bomb takes place due to

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a) Nuclear fission

b) Nuclear fusion

c) Scalteling

d) Heating

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12. Energy generation in stars is due to

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a) chemical reaction

b) fission

c) fusion of light nuclei

d) Fusion of heavy nuclei

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13. A chain reaction is continuous due to

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a) large mass defect

b) large energy

c) production of more neutrons in fission

d) none of these

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14. Atomic nucleus was discovered by............

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a) Rutherford

b) Newton

c) Einstein

d) Nobel

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15. Nucleons are made of .......................

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a) atoms

b) electrons and protons

c) electrons and neutrons

d) protons and neutrons

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16. henry Becquerel discovered in 1890.

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a) nucleus

b) atom

c) isotops

d) radioactivity

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17. Positively charges radioactive rays are called..................... rays.

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a) α

b) β

c) γ

d) neutral

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18. γ rays are................in charge.

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a) positive

b) negative

c) neutral

d) none

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19. Penetration power is the greatest in ...............rays.

1 point

a) alpha

b) beta

c) gamma

d) helium

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20. Gamma rays are...............in nature.

0 points

a) gravitational

b) electromagnetic

c) weak

d) nuclear

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