Question: Why doping is done?
Answer: Doping is the act of adding impurities to intrinsic semiconductors to change their properties. To enable us as a p-type or n-type semiconductor in a diode, intrinsic semiconductors are doped to raise the concentration of the majority charge carrier.
JKBOSE Physics: Solved Previous Year’s Question Paper for NCERT/CBSE Class 12th Physics Paper Code (XIIRKN16—X) Short Answer Type Questions Question: Explain the Conservation of Charge Answer: Conservation of charge is a law that states that the total amount of electric charge in an isolated system remains constant. This is true for both positive and
Question: Why does the sun look blue? Explain
Answer: Sunlight appears blue because of Rayleigh scattering, which is a type of scattering that occurs when light passes through a medium. When sunlight enters the Earth’s atmosphere, it interacts with molecules of nitrogen and oxygen, which scatter blue light more effectively than other colours. This causes the sky to appear blue, and the sun to appear even more blue because it is a much brighter source of light.
Question: Give any six properties of e.m.waves.
Answer:
1. Electromagnetic waves can travel through a vacuum.
2. Electromagnetic waves travel at the speed of light.
3. Electromagnetic waves can be reflected, refracted, and diffracted.
4. Electromagnetic waves can be polarized.
5. Electromagnetic waves have a frequency and an amplitude.
6. Electromagnetic waves are made up of electric and magnetic fields that are perpendicular to each other and the direction of propagation.
