Entry Test MCQ :: Nuclear Physics

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21.

Fission chain reaction in a nuclear reactor can be controlled by introducing

A.	iron rods	B.	graphite rods
C.	cadmium rods	D.	platinum rods

22.

Which one of the following radiations possesses maximum velocity?

A.	?-rays	B.	?-rays
C.	?-rays	D.	all of above have same speed

23.

Charge on an electron was determine by

A.	Ampere	B.	Maxwell
C.	Millikan	D.	Thomson

24.

Charge on neutron is

A.	plus 1.6 x 10-19C	B.	zero
C.	minus 1.6 x 10-19C	D.	no definite charge

25.

A particle having the mass of an electron and the charge of a proton is called a

A.	antiproton	B.	positron
C.	gamma rays	D.	photon

26.

Mass of neutron is

A.	1.67 x 10-31 kg	B.	1.67 x 10-27 kg
C.	9.1 x 10-31 kg	D.	1.67 x 10-19 kg

27.

Nuclei having the same mass number but different atomic number are

A.	Isotopes	B.	Isobars
C.	Isotones	D.	Isomers

28.

A mass spectrograph (spectrometer) sorts out

A.	molecules	B.	ions
C.	elements	D.	isotopes

29.

Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is

A.	smaller	B.	greater than 82
C.	same	D.	some times smaller some times greater

30.

An ?-particle is emitted from 88Ra226. What is the mass and atomic number of the daughter nucleus?

A.	224 - 84	B.	220 - 80
C.	222 - 86	D.	226 - 87