Post Utme Physics Past Questions and Answers

Question 591:

Water in an open vessel boils at a lower temperature when heated at the mountain top because ____________

A. Pressure is increased
B. Pressure is reduced
C. The rays of sun assists
D. The saturated vapour pressure is eliminated
E. None of the above

Question 592:

Calculate the force acting on an electron of charge \(1.6 \times 10^{-19} \mathrm{C}\) placed in an electric field intensity \(10^{8} \mathrm{Vm}^{-1}\)

A. \(1.6 \times 10^{-11} \mathrm{~N}\)
B. \(1.6 \times 10^{-14} \mathrm{~N}\)
C. \(1.6 \times 10^{-16} \mathrm{~N}\)
D. \(1.0 \times 10^{-16} \mathrm{~N}\)

Question 593:

A body of mass \(400 \mathrm{~g}\) is whirled in a vertical of radius \(2 \mathrm{~m}\) at a steady rate of \(2 \mathrm{rev} / \mathrm{s}\). find its centripetal force.

A. \(160 \mathrm{~N}\)
B. \(102 \mathrm{~N}\)
C. \(320 \mathrm{~N}\)
D. \(252 \mathrm{~N}\)

Question 594:

If the volume of a fixed mass of gas is kept constant, the pressure of the gas ____________

A. Is inversely proportional to its centigrade temperature
B. Is inversely proportional to its absolute temperature
C. Is directly proportional to its centigrade temperature
D. Is directly proportional to its absolute temperature

Question 595:

Find the reactance of \(a\) capacitor \(\frac{500}{\pi} \mathrm{Hz}\) frequency if in a circuit a capacitor has a reactance \(=5 \mathrm{~F}\),

A. 2000
B. 200.50
C. 80.70
D. 190.10