Post Utme Physics Past Questions and Answers

Question 841:

The electrochemical equivalent, of platinum is $5.0\times {10}^{-7}\mathrm{Kg}/\mathrm{C}$. To plate-out $1.0\mathrm{kg}$ of platinum, a current of $100\mathrm{A}$ must be passed through an appropriate vessel for ____________

A. $5.6$ hours
B. 56 hours
C. $1.4\times {10}^4$ hours
D. $2.0\times {10}^4$ hours

Question 842:

At what frequency would a capacitor of 2.5 $\mathrm{F}$ used in a radio circuit have a reactance of $250\mathrm{\Omega }$?

A. $\frac{800}{\pi }\mathrm{Hz}$
B. $\frac{200}{\pi }\mathrm{Hz}$
C. $\frac{2000}{\pi }\mathrm{Hz}$
D. $\frac{\pi }{800}\mathrm{Hz}$

Question 843:

A lorry travels $10\mathrm{km}$ northwards, $4\mathrm{km}$ eastwards, $6\mathrm{km}$ southwards and $4\mathrm{km}$ westwards to arrive at a point $T$. What is the total displacement?

A. $6\mathrm{km}$ south
B. $4\mathrm{km}$ north
C. $6\mathrm{km}$ north
D. $4\mathrm{km}$ east

Question 844:

A particles starts from rest and moves with a constant acceleration of $0.5{\mathrm{ms}}^{-2}$. The distance covered by the particle in $10\mathrm{s}$ is ____________

A. $2.5\mathrm{m}$
B. $5.0\mathrm{m}$
C. $25.0\mathrm{m}$
D. $50.0\mathrm{m}$

Question 845:

The product $PV$ where $P$ is pressure and $V$ is volume has the same unit as ____________

A. Force
B. Power
C. Energy
D. Acceleration