Physics · General Awareness

Physics Measuring Instruments

1,123 Questions

Physics measuring instruments are essential tools used to measure various physical quantities. This topic covers devices like hygrometers, oscilloscopes, and sphygmomanometers. It is a highly scoring section in general science and general awareness examinations.

Pressure and humidity instrumentsElectrical measuring devicesMedical physics toolsNavigational instruments

Physics Measuring Instruments Questions

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

Choose the correct answer from the alternatives given :
For measuring very high temperature, we use

  1. Mercury thermometer

  2. Thermoelectric pyrometer

  3. Platinum resistance thermometer

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Thermoelectric pyrometer is an instrument which uses one or more thermocouples to measure high temperature . 

Hence, option B is correct.

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

At low temperatures ................. type of thermometer is used.

  1. mercury thermometer

  2. water thermometer

  3. alcohol thermometer

  4. thermometers cannot be used
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Alcohol thermometer.
Alcohol expands uniformly.

It has a low freezing point (-115 degree centigrade) therefore it is very suitable for the place where the temperature gets very low.
It is an easily available cheap liquid, which is safe to use.
Alcohol is cheaper than mercury, and if you break the thermometer, it is not toxic.

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

Boiling water can be measured by 

  1. Clinical thermometer

  2. Laboratory thermometer

  3. Both may be used conveniently

  4. Both of them can not be used
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Laboratory thermometers are used to measure temperatures or temperature changes with a high degree of precision. That's why these are mainly used in laboratories. For exp : To measure boiling points of solutions, water etc. They are made up of glass and strength through thermal tempering or annealing. Types : liquid-in-glass, bimetallic strip, infrared based thermometer.
Hence, the answer is Laboratory thermometer.
Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

The clinical thermometer is designed to measure the temperature of

  1. Human body

  2. Bodies kept in refrigerators

  3. Room temperature

  4. boiling water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A Clinical thermometer is a thermometer used to measure human body temperature. Most made in $20th$ century are mercury-in-glass thermometers. They are very fast with small variation in temperature. Most of these thermometers shows Celsius and Fahrenheit ( medical thermometer ) scales and runs from $35°C$ to $42°C.$
Hence, the answer is Human body.
Multiple choice physics heat - measurement thermometers application of various thermometric scales different types of thermometers

What is the use of kink near the bulb in clinical thermometer

  1. It prevents the level of the mercury from falling when taken out of the mouth

  2. It allows the level of the mercury to fall when taken out of the mouth

  3. It allows the level of the mercury to rise when taken out of the mouth

  4. It prevents the level of the mercury from rising when taken out of the mouth
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation
Since, in clinical thermometer, mercury is used and level of mercury rises very rapidly with small variation in temperature that's why thermometers provided with kink near the bulb so it prevents the level of mercury from falling when taken out of mouth.
Hence, the answers are it prevent the level of the mercury from falling when taken out of the mouth, it allows the level of the mercury to fall when taken out of the mouth.
Multiple choice biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

Which of the following can show the direction of wind ?

  1. Anemometer

  2. Wind wane

  3. Wind mill

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

Anemometer: Used to measure the speed of the wind.


Wind wane: Used to show the direction of wind.


Windmill: Converts wind energy to rotational energy.

Barometer: Used to measure atmospheric pressure. 


Hence, option B is correct.

Multiple choice physics measurements and units summary of si units fundamental quantities system of units

The temp of the sun is measured with

  1. platinum thermometer

  2. gas thermometer

  3. pyrometer

  4. vapour pressure
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A pyrometer is a non-contacting device that intercepts and measures thermal radiation, a process known as pyrometry. This device can be used to determine the temperature of an object's surface.  As the temperature of the sun is very high, a non-contact type temperature measurement is needed. So pyrometer will be used to measure the temperature of the sun.
Multiple choice evs circulation of blood blood transfusion transfusion of blood blood and organ donation

Which of the following can be used to make a stethoscope at home?

  1. Rubber tube

  2. Balloon

  3. Funnel

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Steps to construct a stethoscope at home:

1) Take a funnel and put its small end at one end of the flexible tube. Push the funnel as far as u can into the tube.
2) Tape the funnel using suitable tape.
3) Inflate the balloon to stretch it out. Let the air out and then cut the neck of the ballon.
3) Stretch the remaining part of the balloon tightly over the open end of the funnel, and tape it. This creates the tympanic membrane for the stethoscope
4) Place the funnel end of the stethoscope on to the chest and end of the tube to the ear to listen to the heartbeat.
Hence rubber tube, balloon and funnel can be used to make a stethoscope at home.
So, the correct answer is 'All of the above'.

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Which tool can be used to make precise measurements of varying volumes?

  1. Beaker

  2. Graduated cylinder

  3. Volumetric flask

  4. Test tube
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Beaker can be used to make precise measurements of varying volumes. A beakes is basically a broad cylindrical container with a flat bottom. It has a small spout to aid pouring. It also has some graduations for measurement of liquid.

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Which one of the following commonly used in the laboratory in a filtration setup?

  1. Balance

  2. Barometer

  3. Condenser

  4. Funnel

  5. Pipette
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Filtration is a technique that is used to either remoue solid impurites from an inorganic sdution or $two$ isolate an organic solid.

Thus, filtration setup involves a filter paper placed in a filter funnel. Therefore, funnel is used in filtration. A funnel is basically a tube or a pipe that is wide at the top and is narrow at the bottom. It is used for guiding a liquid or powder into into a small openning.

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Which one of the following is used in the laboratory to transfer exact volume of liquid from one tube to another tube?

  1. Balance

  2. Barometer

  3. Condenser

  4. Funnel

  5. Pipette
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

$\rightarrow $ Pipette is a laboratory tool in chemistry to transfer exact volume of liquid from one tube to another.

$\rightarrow $ Balance is used to measure the weight of substance.
 $\rightarrow $ Barometer is used to measure atmospheric pressure.
$\rightarrow $ Condenser $\rightarrow $ used to cool hot gases into liquids.
$\rightarrow $ Funnel $\rightarrow $ used to remove fine particles from liquid using filter paper.

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Which piece of laboratory equipment is used to make precise measurement of only one volume?

  1. Beaker

  2. Graduated cylinder

  3. Volumetric flask

  4. Test tube

  5. Eudiometer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Volumetric flasks are used to measure volume of liquids .  The liquid has accurate volume when the solution reaches to the corresponding marking on the scale. Volume is usually indicated in mL. During measurement of the volume the vessel must be placed on an even, horizontal support. The required volume is measured when the lower edge of meniscus of the liquid just touches the marking on the vessel.