Post Utme Physics Past Questions and Answers

Question 131:

The name of an atom is associated with its atomic number Z, mass number \(A\) and neutron number N. Therefore ____________

A. \(A=Z+N\)
B. \(Z=A+N\)
C. \(N=A+Z\)
D. \(A=N-Z\)

Question 132:

A nuclear reaction initiated by adding neutron is called ____________

A. Nuclear fission
B. Nuclear fusion
C. Nuclear enrichment
D. Radioactivity

Question 133:

The mass defect resulting from a thermonuclear reaction is \(9.8 \times 10^{-30} \mathrm{Kg}\).
Calculate the energy released. Take \(c=3 \times 10^{8} \mathrm{~m} / \mathrm{s}\)

A. \(2.94 \times 10^{-22} \mathrm{~J}\)
B. \(8.82 \times 10^{-22} \mathrm{~J}\)
C. \(8.82 \times 10^{-14} \mathrm{~J}\)
D. \(8.82 \times 10^{-13}\)

Question 134:

Which of the following represents the correct precision if the length of a piece of wire is measured with a meter rule?

A. \(35 \mathrm{~mm}\)
B. \(35.0 \mathrm{~mm}\)
C. \(35.00 \mathrm{~mm}\)
D. \(35.01 . \mathrm{mm}\)

Question 135:

To keep a vehicle moving at a constant speed \(V\) requires power \(P\), from the engine. The force provided by the engine is ____________

A. P/V
B. V/2
C. PV
D. P/V