Physics · General Awareness

Physics Measuring Instruments

1,180 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.

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Physics Measuring Instruments Questions

Multiple choice physics electric current through conductors carbon resistance and colour codes for carbon resistance carbon resistors and their colour coding resistors

The sequence of bands in carbon resistor are brown, black, brown and gold, the value of resistance is (in $\Omega$)

  1. Exactly 100

  2. 95 to 105

  3. 90 to 110

  4. 80 to 120
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

${1^{st}}Band:Brown - 1$

${2^{nd}}Band:Black - 0$
$Multiplier:Brown -  \times 10\Omega $
$Tolerance: \pm 5\% $
${\rm{Resistor }}value:{\rm{ }}100\Omega  \pm 5\% $
$95$ to $105\Omega$ 

Multiple choice physics electric current through conductors carbon resistance and colour codes for carbon resistance carbon resistors and their colour coding resistors

A resistor with the color coded value of 1000 ohms and 10% tolerance can have an actual resistance between

  1. 900 ohm and 1100 ohm

  2. 900 ohm and 1010 ohm

  3. 990 ohm and 1010 ohm

  4. 900 ohm and 1000 ohm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

color coding gives a range in which value of resister lies.


Actual resistance $R=1000\pm 10$%
$ R=1000\pm 1000\times \frac { 10 }{ 100 } \ R=1000\pm 100$
Value of R is between 900 to 1100ohms.

Multiple choice physics electric current through conductors carbon resistance and colour codes for carbon resistance carbon resistors and their colour coding resistors

The colour code of a resistor is brown, black and brown. Then the value of resistance is .....

  1. $10 \Omega$
  2. $100 m \Omega$
  3. $0.1 k\Omega$

  4. 100 + 5%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Answer is C.

Carbon-composition and carbon film resistors are too small to have the resistance value printed on their housings. Therefore, bands of color are used to represent the resistance value.
The first and second band represents the numerical value of the resistor, and the color of the third band specify the power-of-ten multiplier. The color bands are always read from left to right starting with the side that has a band closer to the edge.
Hence, for a brown, black, brown color code of a resistor. The resistance value is 100 ohms, that is, $0.1k\Omega $.

Multiple choice physics electric current through conductors carbon resistance and colour codes for carbon resistance carbon resistors and their colour coding resistors

Color of the four strips of carbon resistor are respectively orange, green, golden, silver. Then its resistance is :

  1. $2.5 \pm 10$% ohm
  2. $3.5 \pm 5$% ohm
  3. $3.5 \pm 10$% ohm
  4. $350 \pm 10$% ohm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Code of orange$=3$


Code of green $=5$


Code of golden $=\div10$

Code of silver , Tolerance$=\pm 10$%

The resistance of wire, $R=3.5\pm10$% $ohm$

The correct option is C.

Multiple choice chemistry materials around us and different types of houses materials around us matter and its states different states of matter

Which of the following is the most precise for measuring the volume of a liquid?

  1. Test tube

  2. Graduated cylinder

  3. Burette

  4. Volumetric flask

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

Volumetric flask is the most precise for measuring the volume of a liquid.


When the values of different measurements are close to each other as well as to average value, such measurements are called precise.

Hence the correct option is D.

Multiple choice social studies precautions for natural disasters cyclonic winds monsoon phenomena and its mechanism tsunami, floods, cyclones, droughts and landslides

The instrument that measures the wind speed in a cyclone is ________.

  1. Anemometer

  2. Barometer

  3. Thermometer

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

An anemometer is commonly used to measure wind speed. Wind speed, or wind flow velocity, is a fundamental atmospheric quantity. Wind speed is caused by air moving from high pressure to low pressure, usually due to changes in temperature. Wind speed is now commonly measured with an anemometer but can also be classified using the older Beaufort scale which is based on people's observation of specifically defined wind effects.

Multiple choice physics learning how to measure measurement of area and volume measurement of volume measurement of area, volume and density

Which of the following is used to measure the volume of a regular shaped object?

  1. Metre scale

  2. Vernier callipers

  3. Screw guage

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

To find the volume of a regular shaped object ,first its dimensions are measured using either a metre scale, a vernier callipers or a screw gauge and then volume is calculated using corresponding relations.

Multiple choice physics learning how to measure measurement of area and volume measurement of volume measurement of area, volume and density

Which of the following is used to measure the volume of a liquid or an irregular shaped object?

  1. A burette

  2. A measuring flask

  3. A measuring cylinder

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

Volume of a liquid or an irregular solid object is measured with the help of burettes, measuring flasks and measuring cylinders.

Multiple choice physics learning how to measure measurement of area and volume measurement of volume measurement of area, volume and density

Which of the following is not used to measure the volume of a liquid or an irregular shaped object?

  1. A pipette

  2. A measuring flask

  3. A graduated cylinder

  4. A meter scale
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A liquid or an irregular shaped object does not have a geometric shape. So, by measuring its certain dimensions, volume may not be calculated. Hence a meter scale can not be used to measure the volume of a liquid or an irregular shaped object.

Multiple choice physics learning how to measure measurement of area and volume measurement of volume measurement of area, volume and density

Which of the following instruments can be used to measure the volume of a liquid?

  1. Measuring cylinder

  2. Vernier callipers

  3. Pipette

  4. Measuring flask
Reveal answer Fill a bubble to check yourself
A,C,D Correct answer
Explanation

Measuring cylinder, pipette and measuring flask are used to measure the volume of the given liquid whereas vernier calliper is used measure the length of the object.

Multiple choice physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

Which of the following would show deflection in the compass needle, the moment you dip the free ends of the tester?

  1. Tap water, vinegar

  2. Tap water, vegetable oil

  3. Tap water, honey

  4. Vegetable oil, honey
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tap water and vinegar are good conductors of electricity and hence, the compass needle could show deflection.

Multiple choice archimedes' principle fluid pressure properties of matter physics

Which of the following instrument is used to measure the volume of a solid by water displacement ?

  1. Thermometer

  2. Graduated cylinder

  3. Buret

  4. Salt bridge

  5. Conductivity tester
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Graduated cylinder  is used to measure the volume of a solid by water displacement. The volume of water displaced will be equal to the volume of the solid.