Physics Practice Test – Pressure (Solid, Liquid and Gas) Questions with Answers and Explanations

The height at which the atmosphere ceases to exist is about 80 km, If the atmosphere pressure on the ground level is 760 mmHg, the pressure at a height of 20 km above the ground level is ______ (JAMB 2001)

A. 380 mmHg   B. 190 mmHg  C. 570 mmHg    D. 480 mmHg

Two liquids L₁ and L₂ are contained in a U-tube. The height and the density of L₁ are 8 cm and 10³ kgm^-3 respectively. If the density of L₂ is 800 kgm^-3, its height measured from the same level is _____ (JAMB 2005)

A. 10 cm   B. 12 cm   C. 10 cm   D. 8 cm

As the pressure of a fluid increases, its viscosity ______ (JAMB 2004)

A. decreases.
B. remains constant.
C. increases then decreases.
D. increases

In the Hare’s apparatus, water rises to a height of 26.5cm in one limb. If a liquid rises to a height of 20.4 cm in the other limb, what is the relative density of the liquid? (JAMB 2008)

A 0.8    B. 1.1     C. 1.2      D. 1.3

The stylus of a phonograph record exert a force of 7.7 x 10-2 N on a groove of radius IO-’m. Compute the pressure exerted by the stylus on the grooves. (JAMB 2003)

A. 2.45 x 10⁸ Nm^-2
B. 3.45 x 10⁸ Nm^-2
C. 4.90 x 10⁸ Nm^-2
D. 2.42 x 10⁹ Nm^-2