Tag: heat - measurement

Quizzes (5) Questions (94)

Questions Related to heat - measurement

Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

Before using the clinical thermometer mercury level should be below:

  1. $ 45 ^\circ C$

  2. $ 35 ^\circ C$

  3. $ 95 ^\circ C$

  4. $ 55 ^\circ C$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The mercury level should be below $35^{o}C$ or $94^{o}F$, because minimum temperature of human body can not be below $35^{o}C$. Hence, it must be at lowest level to measure the temperature of human body correctly.

Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

__________thermometers include two different metals that are bonded together and expand at different rates as they warm up.

  1. Liquid in glass

  2. Gas

  3. Bimetallic strip

  4. Resistance
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bimetallic thermometer include two different metals , bonded together . These two metals have different coefficients of thermal expansion , due to this they expand or contract at different rates , when put into a temperature change together .This is the principle of a bimetallic thermometer .

Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

 Water cannot be used as a liquid in a thermometer because it has:

  1. higher freezing point and lower boiling point than other thermometric liquids

  2. lower freezing point and higher boiling point than other thermometric liquids

  3. low specific heat capacity

  4. transparent colour
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water cannot be used in thermometer because of its higher freezing point and lower boiling point than other liquids .  If water is used in a thermometer , it will start phase change at $0^{o}C$ and $100^{o}C$ and will not measure temperature , out of this range . This range is very small as compared  to other liquids as mercury , having freezing point about $-39^{o}C$ and boiling point $356^{o}C$ .

Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

What does the bulb of a clinical thermometer contain?

  1. Water

  2. Mercury

  3. Iron

  4. Zinc
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A clinical thermometer is a thermometer used to measure human body temperature. Most old ones use mercury thermometer. It is accurate and sensitive, because it has a narrow place where the mercury level rises very fast.

These thermometers are used in clinics by doctors, so they are also called a doctor's thermometers or medical thermometers. Most of them show both Celsius scale and Fahrenheit temperature scales. The scale runs from 35 degree Celsius to 42 degree Celsius.

Medical thermometers are cleaned before and after each use, with alcohol.
Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

Suppose in a clinical thermometer, the difference between first and second bigger marks is $1^o$ and there are 5 small divisions between them then each small division refers to the difference in scale of:

  1. $0.1^oC$

  2. $0.2^oC$

  3. $0.3^oC$

  4. $0.4^oC$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Suppose in a clinical thermometer, the difference between first and second bigger marks is 1o and there are 5 small divisions .
the bigger marks read one degree and there are five divisions between them. Then, one small division can read $\dfrac{1}{5} =  0.2 ^oC$ 

Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

What is the limit of temperatures human body can achieve?

  1. $25^oC$ to $42^oC$

  2. $35^oC$ to $42^oC$

  3. $35^oC$ to $62^oC$

  4. $5^oC$ to $42^oC$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Normal human body temperature, also known as normothermia or euthermia, is the typical temperature range found in humans. The normal human body temperature range is typically stated as $36.5–37.5 °C (97.7–99.5 °F).$
The limit of temperatures human body can achieve is $35^oC $ to $62^oC$

Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

Which of the following methods would reduce the temperature of hot tea

  1. Add more tea at the same temperature

  2. Add water at the same temperature

  3. Add water at temperature lower than the temperature of tea

  4. Add water at temperature higher than the temperature of tea
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

temperature of hot tea add water at temperature lower than the temperature of tea

Water is an  effective coolant,For a coolant a substance has to have a high specific heat capacity, meaning it can absorb a lot of heat. It also has to be nontoxic, or non-poisonous. It also needs to be fairly common, which would mean since it is readily available, the cost should be fairly low