# SSC MTS EXAM

## SSC

### PHYSICS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Convection is heat transfer by-
 A Touch an object B The heating and cooling of a fluid C Electromagnetic Waves D None of the above
Explanation:

Detailed explanation-1: -What is Convection? Convection is the process of heat transfer by the bulk movement of molecules within fluids such as gases and liquids. The initial heat transfer between the object and the fluid takes place through conduction, but the bulk heat transfer happens due to the motion of the fluid.

Detailed explanation-2: -Convection occurs when heat is carried away from your body via moving air. If the surrounding air is cooler than your skin, the air will absorb your heat and rise. As the warmed air rises around you, cooler air moves in to take its place and absorb more of your warmth. The faster this air moves, the cooler you feel.

Detailed explanation-3: -Convection is the process of thermal energy exchange in fluids via the motion of matter within them. A bulk transfer of molecules within the fluid occurs. It occurs in both gases and liquids and leads to a cyclical effect. Both natural and forced convective heat transfer exist.

Detailed explanation-4: -Convection is the transfer of thermal energy by particles moving through a fluid. When particles in one area of a fluid gain thermal energy, they move more quickly, have more collisions, and spread farther apart. This decreases the density of the particles, so they rise up through the fluid.

There is 1 question to complete.