EXPLAIN HOW ALL THE AIR IN A ROOM GETS HEATED WHEN A ROOM HEATER IS KEPT ON A FLOOR IN A CORNER IS SWITCHED ON.DRAW A LABELLED DIAGRAM TO ILLUSTRATE YOUR ANSWER
Dear Student
Convection heats up the room when a room heater is kept on a floor in a corner is switched ON.
Heated air at one part of the room is transfers heat by convection.
Air near the heater gets heated up, expands and becomes lighter. Being lighter, hot air rises up and carries heat along it. Cold air being dense, sinks downwards. Later this cold air also gets heated up and rises upwards. Again the cooler air will sink. This is how all the air gets evenly heated in the room.
Once convection current of hot air is set up, it is spread out in the room through radiations.
Regards
Convection heats up the room when a room heater is kept on a floor in a corner is switched ON.
Heated air at one part of the room is transfers heat by convection.
Air near the heater gets heated up, expands and becomes lighter. Being lighter, hot air rises up and carries heat along it. Cold air being dense, sinks downwards. Later this cold air also gets heated up and rises upwards. Again the cooler air will sink. This is how all the air gets evenly heated in the room.
Once convection current of hot air is set up, it is spread out in the room through radiations.
Regards