Tag: heat - measurement

Questions Related to heat - measurement

Reading of temperature may be same on

physics heat - measurement sources of heat introduction to heat measuring temperature

  1. Celsius and kelvin scale

  2. Fahrenheit and Celsius scale

  3. Kelvin scale

  4. None of these

Show answer
Correct Option: B

Three liquids A, B and C are at temperature of $60^{o}C, 55^{o}C$ respectively $4g$ of A mixed with $3g$ of C gives $65^{o} C$ and $2g$ of A mixed with $3g$ of B gives $57^{o}C$. The temperature of the mixture when equal masses of $B$ and $C$ are mixed is 

physics heat - measurement sources of heat introduction to heat measuring temperature

  1. $52.1^{o}C$

  2. $55^{o}C$

  3. $52.5^{o}C$

  4. $53^{o}C$

Show answer
Correct Option: A

The temperature of equal masses of three different liquids $A, B$ and $C$ are $12^{o}C, 19^{o}C$ and $28^{o}C$ respectively. the temperature when A and B are mixed is $16^{o}C$, when B and C are mixed is $23^{o}C$ what is the temperature when A and C are mixed 

physics heat - measurement sources of heat introduction to heat measuring temperature

  1. $31^{o}C$

  2. $20.26^{o}C$

  3. $19.5^{o}C$

  4. $28^{o}C$

Show answer
Correct Option: A

The standard fixed point for temperature measurement is used these days is :

physics heat - measurement sources of heat introduction to heat measuring temperature

  1. melting point of ice at S.T.P.

  2. that temperature at which ice, water and water vapour coexist

  3. that temperature at which pure ice and pure water coexist

  4. none of the above

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Correct Option: B
Explanation:

(B)The triple point of a substance is unique, i.e. it occurs at one particular set of values of pressure and temperature. The melting point of ice and boiling point of water are not unique. They change with change in value of pressure or due to the presence of impurities in water.

During burning of a candle, different zones of combustion in the flame are listed below:

A. outermost zone
B. innermost zone
C. middle zone
The correct order of temperature of zones is :

physics heat - measurement sources of heat introduction to heat measuring temperature

  1. $A > B > C$

  2. $C > B > A$

  3. $B > C > A$

  4. $A > C > B$

Show answer
Correct Option: D
Explanation:

The correct order of temperature of zones of candle flames is -
Outermost zone > Middle zone > innermost zone.
Because outerzone will have the highest temperature and inner zone will have the least temperature.

At what temperature is the Fahrenheit scale reading equal to twice of Celsius ?

physics heat - measurement sources of heat introduction to heat measuring temperature

  1. $ 40^0C $

  2. $ 160^0C $

  3. $ 80^0C $

  4. $ 100^0C $

Show answer
Correct Option: B
Explanation:

We know the relation between Fahrenheit scale and degree celsius,


$\dfrac{C-0}{100}=\dfrac{F-32}{180}$

Given,

$F=2C$

Then,

$\dfrac{C}{100}=\dfrac{2C-32}{180}$

$\dfrac{C}{100}=\dfrac{C-16}{90}$

$\implies 9C=10C-160$

$\implies C=160^0C$

A________is used to measure temperature

physics heat - measurement application of various thermometric scales different types of thermometers measuring temperature introduction to temperature

  1. Thermometer

  2. Barometer

  3. Manometer

  4. None of these

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Correct Option: A
Explanation:

A thermometer is a device that measures temperature or a temperature gradient. A thermometer has two important elements: (1) a temperature sensor (e.g. the bulb of a mercury-in-glass thermometer or the digital sensor in an infrared thermometer) in which some change occurs with a change in temperature, and (2) some means of converting this change into a numerical value (e.g. the visible scale that is marked on a mercury-in-glass thermometer or the digital readout on an infrared model). Thermometers are widely used in industry to monitor processes, in meteorology, in medicine, and in scientific research

Water is better thermometric liquid

physics heat - measurement application of various thermometric scales different types of thermometers measuring temperature introduction to temperature

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

The above statement is false.

Water can't be used as thermometric liquid as:
(i) It sticks to the glass
(ii) It is transparent, and hence difficult to read its level through 
(iii) It is volatile and hence vapors apply pressure on the surface thereby affecting reading
(iv) It is a poor conductor of heat.
(v) its expansion is not uniform.
(vi) It freezes at 0°C and boils at 100°C and hence range is not very wide.

State whether given statement is True or False
Thermometer measures the heat energy in a body

physics heat - measurement application of various thermometric scales different types of thermometers measuring temperature introduction to temperature

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

A thermometer is a tool that measures temperature — how hot or cold something is.Made up of thermo (heat) and meter (measuring device), the meaning of the word thermometer is pretty straightforward. Thermometers measure temperatures in degrees, according to either the Celsius or Fahrenheit system.

Thermometer measures the temperature of body

State whether true or false.
Thermometer is an instrument used for measuring the temperature of a body

physics heat - measurement application of various thermometric scales different types of thermometers measuring temperature introduction to temperature

  1. True

  2. False

Show answer
Correct Option: A
Explanation:
A Thermometer is a device. which measures the temperature of the body it is brought in contact with.
Hence, OPTION : A (true).