Consider the following statements
1. Light of longer wavelength is scattered much more than the light of shorter wavelength.
2. The speed of visible light in water is 0.95 times the speed in vacuum.
3. Radio waves are produced by rapidly oscillating electrical current.
4. To detect the over speeding vehicles, police use the Doppler effect of reflected short radio waves.
Which of these statements are correct?
1. Light of longer wavelength is scattered much more than the light of shorter wavelength.
2. The speed of visible light in water is 0.95 times the speed in vacuum.
3. Radio waves are produced by rapidly oscillating electrical current.
4. To detect the over speeding vehicles, police use the Doppler effect of reflected short radio waves.
Important Questions on Physics
Assertion (A): With the increase of temperature, the viscosity of glycerin increases.
Reason (R): Rise of temperature increases kinetic energy of molecules.
Assertion (A): An iron ball floats on mercury but gets immersed in water.
Reason (R): The specific gravity of iron is more than that of mercury.
Assertion (A): The weight of a body decreases with the increase of altitude on Earth.
Reason (R): The Earth is not a perfect sphere.
1. Steam at 100'C and boiling water at 100°C contain same amount of heat
2. Latent heat of fusion of ice is equal to the latent heat of vaporisation of water.
3. In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils
Which of statement(s) given above is/are correct?
Consider the following statements
A 4-wheel vehicle moving in a sharp circular path at high speed will:
1. overturn about its outer wheels
2. overturn about its inner wheels
3. skid outwards
4. skid inwards
Which of these statements are correct?
