Post Utme University of Port Harcourt Physics Past Questions and Answers

Question 11:

A solid weighs $4.8\mathrm{g}$ in air, $2.8\mathrm{g}$ in water and $3.2\mathrm{g}$ in kerosene. The ratio of density of the solid to that of the kerosene is ____________

A. 12
B. 3
C. 2
D. $3/2$
E. $5/4$

Question 12:

The extension in spring when $5\mathrm{g}$ weight was hung from it was $0,56\mathrm{cm}$. if Hooke's law is obeyed, what is the extension caused by a load of $20\mathrm{g}$ weight?

A. $1.12\mathrm{cm}$
B. $2.14\mathrm{cm}$
C. $2.52\mathrm{cm}$
D. $2.80\mathrm{cm}$
E. $2.24\mathrm{cm}$

Question 13:

The ice and steam points of a mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to $3\mathrm{cm}$ and 19 em lengths of the mercury thread. When the thread is $12\mathrm{cm}$, the temperature is ____________

A. ${32}^{\circ }\mathrm{C}$
B. ${48}^{\circ }\mathrm{C}$
C. ${56}^{\circ }\mathrm{C}$
D. ${65}^{\circ }\mathrm{C}$
E. ${75}^{\circ }\mathrm{C}$

Question 14:

An electric cell has an internal resistance of 2 ohms, a current of $0.5\mathrm{A}$ is found to flow when $a$ resistor of 5 ohms resistance is connected across it. What is the electromotive force of the cell?

A. 5 volts
B. $3.5$ volts
C. $2.5$ volts
D. 1 volt
E. 10 volts

Question 15:

A uniform beam HK of length $10\mathrm{m}$ and weighing $200\mathrm{N}$ is supported at both ends. A man weighing, $100\mathrm{N}$ stands at a point $P$ on the beam. if the reactions at $\mathrm{H}$ and $\mathrm{K}$ are respectively $800\mathrm{N}$ and $400\mathrm{N}$, then the distance HP is ____________

A. $4\mathrm{m}$
B. $3\frac{1}{3}\mathrm{m}$
C. $3m$
D. $6\frac{2}{3}\mathrm{m}$
E. $7\mathrm{m}$