The bulb of the thermometer should never touch the surface of the container in which the substance is kept. You should always hold the laboratory thermometer in a straight upright position without titling it. You should always follow the same precautions as that of the clinical thermometer. What precautions should be taken when using a laboratory thermometer? It can measure the temperature from -10 o C to 110 o C. The laboratory thermometer is used to find out the temperature of the other objects such as water rather than human body temperature. You should not touch the bulb of the thermometer at all. It should always be held with care or it can break down. Keep the thermometer straight in order to see the Mercury level precisely. Make sure the temperature of the thermometer is below 35 o C before taking the temperature. Wash the thermometer before and after using it. What precautions should be taken while using a clinical thermometer? Then you can take it out and observe the temperature reading on the thermometer. Then the thermometer is placed beneath the tongue for about a minute. This prevents the Mercury level from falling down on its own in the thermometer.įirstly, wash the thermometer with an antiseptic solution.īefore taking the temperature the thermometer is given a few jerks to bring down the level of Mercury below 35 o C. The clinical thermometer has a small sharp curve (kink) present near the bulb. On an average, the temperature of the human body is around 37 o C.

The scale of the thermometer records the temperature in degree Celsius, generally, 35 o C to 45 o C, which is the range of human body temperature. The level of the Mercury can be measured by reading the scale given on the thermometer. The Mercury level in the thermometer rises up in the thread-like portion of the thermometer which therefore indicates the temperature of the body. The glass tube contains a bulb at one end which is filled with Mercury. It is made up of a glass tube of uniform thickness. It is a device that is used to measure the body temperature of a person. Measuring the temperature of an object using a thermometer In other words, we use a thermometer to measure the temperature of an object. Thermometer: It is a device that can be used to find out how hot an object is.

The temperature of an object: It is the degree of hotness or coldness of an object. We can understand if an object is hot or cold by the sense of touch. The cotton clothes are generally light in colour and are worn in summer season so that we can feel cool. Woollen clothes are generally dark in colour and are worn in the winter season as they protect us from the cold environment.Ĭotton clothes are obtained from the plant fibres. Woollen clothes are obtained from animal fibres. Concepts of Physics by HC Verma for JEE.IIT JEE Coaching For Foundation Classes.

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