# how to increase sensitivity of thermometer igcse

Responsiveness - How quickly the thermometer can register a change in temperature. Q58/59/61: Define responsiveness, range and sensitivity of a thermometer. 4.1 (a) Describe simple experiments to mark the positions of the fixed points on this liquid-in-glass thermometer. Sensitivity - It is the length of increase of the liquid per degree rise in temperature. Sensitivity can be increased by using a material that expands more during a temperature change. The sensitivity of a thermometer can be increased by. Post navigation ← 14. Course overview. This makes more distance for same amount of expansion of liquid. He places the thermometer bulb in ice at 0 °C and marks the position of the end of the liquid thread. Using a thermometer with a smaller bulb – A smaller bulb contains less mercury and hence absorbs heat in shorter time. The sensitivity and responsiveness can be increased by making the bulb at the bottom smaller and decrease the amount of glass surrounding it. Fig. 6 UCS 2020 0625/42/M/J/20 4 Fig. Describe one change in the design of a liquid-in-glass thermometer that would increase its sensitivity. The range of a thermometer, on the other hand, refers to the dissimilarity between the maximum and the minimum temperature. 3 A student calibrates an unmarked liquid-in-glass thermometer. Ans: Range - The minimum and maximum temperatures that the thermometer can measure. A glass bulb with thinner wall – Heat can be transferred to the bulb easily. The liquid inside the thermometer has a melting point of –39 °C. Anything that makes it easier to detect small changes in temperature increases the precision, or sensitivity of a liquid thermometer Some of the factors which increase sensitivity are: Using a thermometer with a smaller glass bulb , as a smaller bulb contains less liquid and therefore, absorbs heat in … Sensitivity, range and linearity of measuring instruments-Sensitivity, range and linearity. Responsiveness - How quickly the thermometer can register a change in temperature. It is calculated in meter/degree Celsius. 4.1 shows a liquid-in-glass thermometer without a temperature scale. Thermometers and temperature 16. The sensitivity of a thermometer is defined as the increase in the length of the mercury column per unit increase in temperature. Sensitivity - It is the length of increase of the liquid per degree rise in temperature. Sensitivity of Thermometer. Mercury expands less than alcohol. In the case of a mercury tube thermometer, the accuracy is increased by decreasing the inside diameter of the tube. Q52: Define responsiveness, range and sensitivity of a thermometer. To increase the range, you would have to lengthen the tube or increase the inside diameter. Range - The minimum and maximum temperatures that the thermometer can measure. GCSE Keywords: Scale, Linear, Precision, Sensitivity. Sensitivity: To increase the sensitivity of thermometers you have to put the liquid in a narrower tube.