Post Utme Physics Past Questions and Answers

Question 201:

The quality of sound depends on its ____________

A. Frequency
B. Wavelength
C. Velocity
D. Harmonics

Question 202:

The resistance of a piece of wire of length \(20 \mathrm{~m}\) and crosssectional area \(8 \times 10^{-6} \mathrm{~m}^{2}\) has a resistance of \(1 \Omega\).
The resistivity of the wire is ____________

A. \(3 \times 10^{-7} \Omega / \mathrm{m}\)
B. \(4 \times 10^{-7} \Omega / \mathrm{m}\)
C. \(1.6 \times 10^{5} \Omega / \mathrm{n}\)
D. \(4 \times 10^{-5} \Omega / \mathrm{m}\)

Question 203:

In an \(A C\) circuit that contains only a capacitor the voltage

A. Leads the current by \(90^{\circ}\)
B. Lags behind the current by \(90^{\circ}\)
C. Leads the current by \(180^{\circ}\)
D. Lags behind the current by \(180^{\circ}\)

Question 204:

The angle between the direction of the earth's magnetic field and the horizontal is called ____________

A. Angle of deviation
B. Magnetic declination
C. Magnetic meridian
D. Angle of dip

Question 205:

Which of these statements is not correct concerning atomic structure?

A. Negatively charged electrons orbit the positively charged nucleus
B. Electromagnetic forces bind the electrons to the nucleus
C. Protons and neutrons have approximately equal mass
D. The number of electrons orbiting the nucleus is equal to the number of nucleons