GK - Physics
41.
Outside of cooking utensils are generally left black from below because
Answer
The outside surface of a utensil used for heating is coated black so that it may absorb more heat and make heating quicker. This is because black surface is a good absorber of heat.
Answer :
Option DExplanation :
The outside surface of a utensil used for heating is coated black so that it may absorb more heat and make heating quicker. This is because black surface is a good absorber of heat.
42.
Rainbow is formed due to
Answer
A rainbow is a meteorological phenomenon that is caused by total internal reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
Answer :
Option DExplanation :
A rainbow is a meteorological phenomenon that is caused by total internal reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
43.
The hydraulic brakes used in automobiles is a direct application of :
Answer
Its based on Pascal's Law for transmission of fluid pressure, whenever external pressure is applied on any part of a fluid contained in a vessel, it is transmitted ubdiminished and equally in all directions.
Answer :
Option DExplanation :
Its based on Pascal's Law for transmission of fluid pressure, whenever external pressure is applied on any part of a fluid contained in a vessel, it is transmitted ubdiminished and equally in all directions.
44.
It is more difficult to walk on a sandy road than on a concrete road because
Answer
Answer :
Option B45.
Which of the following has the shortest wavelength?
Answer
Gamma rays has the shortest wavelength and radio waves has the longest wavelength.
Answer :
Option AExplanation :
Gamma rays has the shortest wavelength and radio waves has the longest wavelength.
Jump to page number :