NCERT Exemplar Solutions Class 7 Science Solutions for Heat - Exercise in Chapter 4 - Heat

Question 18 Heat - Exercise

A laboratory thermometer A is kept 7 cm away on the side of the flame while a similar thermometer B is kept 7 cm above the flame of a candle as shown in Figure 4.5.

Question 18 Image - NCERT Exemplar Solutions - Science - class 7 chapter Heat

Which of the thermometers, A or B, will show a greater rise in temperature? Give reason for your answer.


Answer is image b)

Explanation :

Air near candle gets heated up and after this it rises by convection so the thermometer B will receive more heat than the thermometer A So, according to the given condition thermometer B will show a greater rise in temperature.

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