Tag: heat - measurement

Quizzes (5) Questions (94)

Questions Related to heat - measurement

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

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 

  1. $52.1^{o}C$

  2. $55^{o}C$

  3. $52.5^{o}C$

  4. $53^{o}C$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Using the principle of calorimetry (heat lost = heat gained), we can determine the relative specific heats of the liquids. Solving the equations for the mixtures allows us to find the final equilibrium temperature when B and C are mixed.

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

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 

  1. $31^{o}C$

  2. $20.26^{o}C$

  3. $19.5^{o}C$

  4. $28^{o}C$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice physics heat - measurement sources of heat introduction to heat measuring temperature

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

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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 :

  1. $A > B > C$

  2. $C > B > A$

  3. $B > C > A$

  4. $A > C > B$
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. $ 40^0C $

  2. $ 160^0C $

  3. $ 80^0C $

  4. $ 100^0C $
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

We know the relation between Fahrenheit scale and degree celsius,


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

Given,

$F=2C$

Then,

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

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

$\implies 9C=10C-160$

$\implies C=160^0C$

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

A________is used to measure temperature

  1. Thermometer

  2. Barometer

  3. Manometer

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
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

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

Water is better thermometric liquid

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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