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 \(250 \Omega\)?

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 \(P V\) where \(P\) is pressure and \(V\) is volume has the same unit as ____________

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