This GATE practice test consists of nuclear physics questions which are part of the GATE question papers for physics. Solve GATE previous papers to crack GATE 2012 exam and get admission in IITs.
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Which of the following nuclides is least likely to be detected?
D. 208Pb (Z = 82)
B. 115Nd (Z = 60)
C. 175Lu (Z = 71)
A. 52Fe (Z = 26)
E. 238U (Z = 92)
The half-life of a radioactive substance is
A. half the time it takes for the entire substance to decay
B. usually about 50 years
C. the time for radium to change into lead
D. calculated from E = mc2
E. the time for half the substance to decay
Two protons are separated by 10−16 m. The nuclear (N), electrostatic (E), and gravitational (G) forces between these protons, in order of increasing strength, are
E. E, G, N
C. G, E, N
D. G, N, E
B. N, G, E
A. E, N, G
If a nucleus has mass M, Z protons (mass mp), and N neutrons (mass mn), its binding energy is equal to
A. Mc2
D. (Zmp +Nmn)c2
C. (Zmp +Nmn −M)c2
E. (Zmp −M)c2
B. (M − Zmp −Nmn)c2
The mass density of an atomic nucleus is
C. increases with increasing nuclear mass
B. about 1012 kg/m3
D. increases with decreasing nuclear radius
E. about the same as that of all other nuclei
A. about 1015 kg/m3
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