BUK Physics 2019/2020 Past Questions

When a light ray approaches glass-air interlace from the glass side, the critical angle of refraction is:

When you sit in front of an open fire you are warmed by a ____.

An electron is placed mid-way between an electron of charge 1C and a proton of charge 1C separated by a distance of 2m. What is the magnitude of the force experienced by the electron?

A test tube of radius 1.0cm is loaded to 8.8g. If it is placed upright in the water, find the depth to which it would sink.
(g = 10ms^-2 ,density of water = 1000gm^-3 )

The minimum number of pulleys in a block and tackle needed to achieve an M.A of 6 is __.

If a man cannot see objects very close to him the following can be used to correct the problem

Any successful lift-off of space-craft uses the application of

Which of these is not a consequence of hydrogen bubbles covering the upper place of a primary cell?

A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If the acceleration due to gravity is 10m/s², the power expended is

Positive charges usually move from