This document contains 50 physics problems with multiple choice answers. The problems cover topics such as potential difference in a potentiometer, transformer output voltage ratios, the cause of sky color and star twinkling, resistor combinations, logic gates, pressure as a force per unit area, velocity-time graphs, temperature scales, optics concepts like refraction and diffraction, semiconductor doping, radioactive decay types, lens and mirror formulas, circuit elements like resistors and capacitors, waves and sound, atomic structure, kinematics, and more. The correct answers are indicated by letters a, b, c or d for each problem.