Entry Test MCQ :: Nuclear Physics

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11.

Radioactivity is a ______ (A) Spontaneous activity (B) Chemical property

A.	A & B	B.	B & C
C.	C & A	D.	A B & C

12.

Energy liberated when one atom of U-235 undergoes fission reaction is

A.	200MeV	B.	40MeV
C.	30MeV	D.	20MeV

13.

Transuranic elements have atomic number

A.	greater than 72	B.	greater than 82
C.	greater than 92	D.	greater than 102

14.

Nuclear forces exist between

A.	proton-proton	B.	proton-neutron
C.	neutron-neutron	D.	all of the above

15.

Mass defect per nucleon is

A.	binding energy of nucleus	B.	packing fraction
C.	average energy of nucleus	D.	all of above are one and same thing

16.

Tick the correct statement

A.	moderators slow down the neutrons	B.	moderators bring the neutrons to rest
C.	moderators absorb the neutrons	D.	moderators reflect the neutrons

17.

The bombardment of nitrogen with ?-particles will produce

A.	neutron	B.	Proton
C.	electron	D.	positron

18.

Diameter of an atom is approximately

A.	10-12m	B.	10-11m
C.	10-10m	D.	10-14m

19.

Radioactive decay obeys which one of the following law?

A.	N=N?e-?t	B.	N=N?e?t
C.	N=N?e-?t/2	D.	N?=N(1+e?t)

20.

Average energy required to remove one nucleon from the nucleus is called

A.	binding energy per nucleon	B.	energy of decay
C.	destruction energy	D.	all of above