Tag: measuring temperature

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Questions Related to measuring temperature

Multiple choice physics temperature and heat application of various thermometric scales different types of thermometers measuring temperature

To mark a temperature scale on a thermometer, standard temperatures knows as fixed points are needed.
Which of these is a fixed point on the Celsius scale?

  1. room temperature

  2. the temperature inside a freezer

  3. the temperature of pure melting ice

  4. the temperature of pure warm water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To define the Celsius temperature scale two "reliable" temperatures are used. These are, the melting point of pure ice, which gives us the lower fixed point of the scale and the boiling point of pure water (at atmospheric pressure) which gives us the upper fixed point.

Multiple choice physics measurement and effects of heat application of various thermometric scales different types of thermometers measuring temperature

The range of clinical thermometer is

  1. $37^{o}C$ to $42^{o}C$

  2. $95^{o}F$ to $110^{o}F$

  3. $90^{o}F$ to $112^{o}F$

  4. $95^{o}C$ to $104^{o}C$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The clinical thermometer is a specially designed thermometer to measure the body temperature. The range of a clinical thermometer is centred around the human body temperature around $37^oC \ to \ 42^oC$.

Multiple choice physics temperature and heat application of various thermometric scales different types of thermometers measuring temperature

A mercury thermometer, with a concave reflector behind the bulb, is placed in front of an electric fire. Which of the following combinations will cause the smallest reading on the thermometer?

  1. Black reflector, black bulb

  2. Black reflector, shiny bulb

  3. Shiny reflector, shiny bulb

  4. Remains same
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A mercury thermometer, with a concave reflector behind the bulb, is placed in front of an electric fire.Black reflector, shiny bulb combinations will cause the smallest reading on the thermometer The black coating absorbs energy and warms up and warms the bulb by conduction.

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

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

Name the device for detecting and measuring small amount of thermal energy.

  1. Pyranometer

  2. Pyrometer

  3. Barrater

  4. Bolometer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A bolometer is a device used for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance.

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

State whether true or false :
A gas thermometer measures temperature with the variation in pressure or volume of a gas.

  1. True

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

A gas thermometer measures temperature by the variation in volume or pressure of a gas.This thermometer functions by Charles's Law. Charles's Law states that when the temperature of a gas increases, so does the volume.

Using Charles's Law, the temperature can be measured by knowing the volume of gas at a certain temperature by using the formula, written below. Translating it to the correct levels of the device that is holding the gas. This works on the same principle as mercury thermometers.

${\displaystyle V\propto T\,},$
or

${\displaystyle {\dfrac {V}{T}}=k} $
T is the temperature.

V is the volume.