SINDH MDCAT 2021 ( PART 3 ) 1. Which of the following is the lightest particle? Proton Photon Electron Neutron 2. What is the momentum of a photon with wavelength and Planck constant (h)? P= 0 P= 2h P=∞ P= h/λ 3. The force between two charges in air is F. What will happen to the force if a metal is placed between the two charges? The force will become zero The force will increase The force will remain the same The force will decrease 4. X-ray production is the opposite of: Electromagnetic radiation Radioactive decay Photoelectric effect Compton scattering 5. The mass of a moving car is 1000 kg, its velocity is 20 m/s, and the speed of the car’s engine is 3000 RPM. What is the approximate power of the car? 18k W 2k W 6k W 12k W 6. What is the number of revolutions in 1260 degrees? 3.5 revolutions 2 revolutions 1 revolution 4 revolutions 7. What is the statement of the law of conservation of mechanical energy? Total energy is the sum of kinetic energy Kinetic energy plus potential energy equals a constant Energy can be created or destroyed Work is equal to the change in kinetic energy 8. What type of wave does not carry energy? Stationary wave Electromagnetic wave Transverse wave Longitudinal wave 9. For sterilization, the waves used are: Radio waves Ultraviolet waves Sound waves Microwaves 10. What is a galvanometer used for? Measuring temperature Amplifying sound Measuring pressure Detecting electric current Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11
