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, $MN$ 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. $16.0\mathrm{cm}$