Physics Past Questions and Answers

The name given to the characteristics behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is

Which of the following statements on the use of X-rays is incorrect? X-rays are used

What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads?

If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is

A quantity of sungas at -133^{[/sup] occupies 1/3m[sup]3} under pressure 1.4 x 10⁵ Nm^-2. if the gas occupies 31 m^-2 at 37^oC, its pressure will be