1) The document provides instructions for a physics exam with 26 multiple choice questions ranging from 1 to 5 marks each. Questions cover topics in physics including electromagnetism, optics, modern physics, and electronics. 2) It provides the key physical constants that can be used to solve the problems. 3) Sample questions include calculating the half-life of a radioactive substance, determining electric field due to a charged wire, explaining p-n junction characteristics in a transistor, and deriving expressions for light velocity in different media and magnetic field due to a current-carrying conductor.