ETEA MDCAT Past Paper 2021 ETEA MDCAT 16 September ( PART 3 ) 1. Which of the following is the lightest particle? Photon Neutron Proton Electron 2. What is the momentum of a photon with wavelength and Planck constant (h)? P= 0 P= h/λ P= 2h P=∞ 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 decrease The force will remain the same The force will become zero The force will increase 4. X-ray production is the opposite of: Compton scattering Radioactive decay Electromagnetic radiation Photoelectric effect 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 12k W 2k W 6k W 6. What is the number of revolutions in 1260 degrees? 1 revolution 2 revolutions 4 revolutions 3.5 revolutions 7. What is the statement of the law of conservation of mechanical energy? Kinetic energy plus potential energy equals a constant Energy can be created or destroyed Work is equal to the change in kinetic energy Total energy is the sum of kinetic energy 8. What type of wave does not carry energy? Longitudinal wave Stationary wave Electromagnetic wave Transverse wave 9. For sterilization, the waves used are: Microwaves Radio waves Ultraviolet waves Sound waves 10. What is a galvanometer used for? Amplifying sound Detecting electric current Measuring pressure Measuring temperature Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11
