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WorksheetsBoard MCQ II PU PHYSICS (33) Chapter13: Nuclei and Radioactivity
Total questions: 10
Worksheet time: 6mins
Strongest force in nature is
Electromagnetic force
Weak nuclear force
Strong nuclear force
Gravitational force
Atomic number of a nucleus represents
Number of protons
Number of protons and neutrons
Number of neutrons
Number of nucleons
Mass number of a nucleus represents
number of proton
number of protons and electrons
number of neutrons
number of nucleons
Difference between mass number and atomic number of a nucleus represents
Number of protons
Number of protons and neutrons
Number of neutrons
Number of nucleons
If Z represents atomic number and A represents mass number of a nucleus, then charge of the nucleus is (e=magnitude of charge of electron)
+Ae
+(A-Z)e
+(A+Z)e
+Ze
Volume of a nucleus is directly proportional to
Atomic number
Atomic mass
Radius of nucleus
Density of nucleus
The nuclear force is
attractive for distance r = 0.5 fm
attractive for distance r < 0.8 fm
repulsive for distarice > 0.8 fm
repulsive for distance < 0.8 fm
If A is the mass number, radius of a nucleus is
directly proportional to A1/3
directly proportional to A 3
inversely proportional to A 1/3
inversely proportional to A 3
The value of energy band in insulators is (a) than 3 eV.
Radius of a nucleus of mass number A is given by (Ro is a constant)
R = Ro A1/3
R = Ro A1/2
R = RO + A1/3
R = RO - A1/3
