Post Utme Physics Past Questions and Answers

Question 831:

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The graph fig. 1 above describes the motion of a particle. The acceleration of the particle during the motion is, ____________

A. \(0.00 \mathrm{~ms}^{2}\)
B. \(0.25 \mathrm{~ms}^{-2}\)
C. \(4.00 \mathrm{~ms}^{-2}\)
D. \(8.00 \mathrm{~ms}^{-2}\)
E. \(10.00 \mathrm{~ms}^{2}\)

Question 832:

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In fig. 2; above, \(M N\) is a light uniform metre rule plvoted at 0 , the \(80 \mathrm{~cm}\) mark. A load of mass \(3.0 \mathrm{~kg}\) is suspended on the, rule at \(L_{1}\) the \(1.0 \mathrm{~cm}\) mark. If the rule is kept in equilibrium by a string \(p\), fixed at \(p\) and attached to the rule at \(\mathrm{R}\), the \(20 \mathrm{~cm}\) mark, then the tension \(T\) In the string is ____________

A. \(25 \mathrm{~N}\)
B. \(50 \mathrm{~N}\)
C. \(250 \mathrm{~N}\)
D. \(5000 \mathrm{~N}\)
E. \(25000 \mathrm{~N}\)

Question 833:

A motor tyre is inflated to pressure of \(2.0\) \(\times 10^{5} \mathrm{Nm}^{-2}\) when the temperature of air is \(27^{\circ} \mathrm{C}\). What will be the pressure in it at \(87^{\circ} \mathrm{C}\) assuming that the volume of the tyre does not change?

A. \(2.6 \times 10^{5} \mathrm{Nm}^{-2}\)
B. \(2.4 \times 10^{5} \mathrm{Nm}^{-2}\)
C. \(2.2 \times 10^{5} \mathrm{Nm}^{-2}\)
D. \(1.3 \times 10^{5} \mathrm{Nm}^{-2}\)

Question 834:

The resistances of platinum wire at the ice and steam points are \(0.75 \mathrm{ohm}\) and \(1.05 \mathrm{ohm}\) respectively. Determine the temperature at which the resistance of the wire is \(0.9 \mathrm{ohm}\)

A. \(43.0^{\circ} \mathrm{C}\)
B. \(50.0^{\circ} \mathrm{C}\)
C. \(69.0^{\circ} \mathrm{C}\)
D. \(87.0^{\circ} \mathrm{C}\)

Question 835:

A trough \(12.0 \mathrm{~cm}\) deep is filled with water of refractive index \(4 / 3\). By how much would a coin at the bottom of the trough appear to be displaced when viewed vertically from above the water surface?

A. \(3.0 \mathrm{~cm}\)
B. \(6.0 \mathrm{~cm}\)
C. \(9.0 \mathrm{~cm}\)
D. \(16.0 \mathrm{~cm}\)