Assertion (A): It is advised not to hold the thermometer by its bulb while reading it.
Reason (R) : If we hold a thermometer by its bulb, the level of mercury in the bulb will get deviated due to the temperature of our hand and this will affect the actual reading.

Both A and R are true and R is the correct explanation of A.

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Both A and R are true, but R is not the correct explanation of A.

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A is true, but R is false.

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A is false, but R is true.

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Solution

The correct option is A Both A and R are true and R is the correct explanation of A.
While using a clinical thermometer, one of the precautions need to be taken to obtain the appropriate temperature is that we should not to hold the thermometer by its bulb while reading it because, if we hold a thermometer by its bulb, the level of mercury in the bulb will get deviated due to the temperature of our hand. This will affect the actual reading.

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Similar questions

Q. Why is it advised not to hold the thermometer by its bulb while reading it?

While reading a thermometer, we should not hold it by the:

Q. In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object. What is the reason for this rise in the level of mercury?

Q. This section contains 1 Assertion-Reason type question, which has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
इस खण्ड में 1 कथन-कारण प्रकार का प्रश्न है, जिसमें 4 विकल्प (a), (b), (c) तथा (d) दिये गये हैं, जिनमें से केवल एक सही है।

A : It is advised that don’t hold the clinical thermometer by its bulb while reading it.
A : डॉक्टरी थर्मामीटर का उपयोग करते समय इसे बल्ब से नहीं पकड़ने की सलाह दी जाती है।

R : Because the level of mercury may change from the actual reading by our body temperature.
R : क्योंकि हमारे शरीर के तापमान से पारे का तल वास्तविक पठन से बदल सकता है।

Question 11

In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object. What is the reason for this rise in the level of mercury?

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Assertion (A): It is advised not to hold the thermometer by its bulb while reading it. Reason (R) : If we hold a thermometer by its bulb, the level of mercury in the bulb will get deviated due to the temperature of our hand and this will affect the actual reading.

Assertion (A): It is advised not to hold the thermometer by its bulb while reading it.
Reason (R) : If we hold a thermometer by its bulb, the level of mercury in the bulb will get deviated due to the temperature of our hand and this will affect the actual reading.