Nuclear Physics ( Part 2 ) - TRB Physics Study Materials

SI NO.	QUESTIONS	ANSWERS
1.	Nuclear force is the ?	Strongest force
2.	The half life of neutron is?	13 minutes
3.	The energy released in a fission is?	200 Mev
4.	The number of fission producing neutron is kept constant and is always equal to one, it is?	Controlled chain reaction
5.	The energy of thermal neutrons is about?	0.025 eV
6.	A liquid drop has a spherical shape due to?	Surface tension
7.	The principle of hydrogen bomb is?	Nuclear fusion
8.	The name cosmic ray was given by?	Millikan
9.	Muons were discovered in?	Cosmic ray studies
10.	Nuclear fission can be explained by?	Liquid drop model
11.	The energy of slow neutrons are?	0-10 eV
12.	Screw dislocation is a ?	Line defect
13.	The nuclear model which explains the behavior of nucleons is?	Shell model
14.	Nucleus of an atom was discovered by?	Rutherford
15.	For the nucleus that dissociates into its constituent nucleons the energy required is?	E=0
16.	Light meters are used in?	Photography
17.	The temperature above which a ferromagnetic becomes a paramagnetic material is called/	Curie temperature
18.	In a step – up transformer the turns ratio is 1:2 leclanche cell of emf 1.5 V is connected across the primary then the voltage developed in the secondary would be?	3V
19.	The unit of electric field intensity is?	Volt/metre
20	The rear view mirror in a motor car is?	Convex mirror
21	Earth quake waves are?	Ultrasonic wave
22	For the collistion between  two glass balls the co efficient of restitution is?	E=0.94
23	The relation between Cp and Cv is called?	Debye’s law
24	If the surface tension on a molecule on the free surface is zero, then the free surface will be?
25	Plane surface IF f=grad then f is a?	Scalar field