Tag: measurement of mass

Questions Related to measurement of mass

Which of the following devices are used for the measurement of mass?

physics measurements and units measuring mass measurement of mass measuring instruments

  1. Simple pendulum

  2. Beam balance

  3. Electroscope

  4. Microscope

Show answer
Correct Option: B
Explanation:

option B is correct 

As simple pendulum is used for measuring time period 
and electroscope and microscope are used to see very tiny particles

Burette and Pipette are used to measure mass

physics measurements and units measuring mass measurement of mass measuring instruments

  1. True

  2. False

Show answer
Correct Option: B
Explanation:
Burette and pipette are the volumetric glassware that are used to measure the volume of liquids (or solutions) mostly in chemistry laboratory. On the other hand mass is the amount of matter in an object which most commonly measured using balance.
Hence, given statement is false.

Which of the following should not be weighed directly in contact with a balance pan?

physics measurements and units measuring mass measurement of mass measuring instruments

  1. glass

  2. ceramics

  3. laboratory chemicals

  4. metal objects

Show answer
Correct Option: C
Explanation:

balance pan can be used to measure the weight of glass, ceramics as well as metal object but it cannot be used to measure the weight of laboratory chemicals directly as the chemicals can react with the base of pan. Also, weight measurement of the chemicals used need to be very accurate, of teh order of milligram as well, which cannot be done with balance pan.

Which of the following is not conducive to an accurate measurement of mass on a beam balance?

physics measurements and units measuring mass measurement of mass measuring instruments

  1. Isolated surroundings

  2. Still air

  3. Air currents

  4. None of these

Show answer
Correct Option: C
Explanation:

Air currents is not conducive to an accurate measurement of mass on a beam balance.

The weights should be carried with forceps to :

physics measurements and units measuring mass measurement of mass measuring instruments

  1. avoid impressing fingerprints on the weights

  2. avoid heat exchange

  3. avoid the change in its weight due to the presence of moisture and dust particles

  4. none of these

Show answer
Correct Option: C
Explanation:

The weights should be carried with forceps to avoid the change in its weight due to the presence of moisture and dust particles.

The humidity of air surrounding the balance installation should be :

physics measurements and units measuring mass measurement of mass measuring instruments

  1. zero

  2. high

  3. it doesn't matter

  4. low

Show answer
Correct Option: D
Explanation:

The humidity of air surrounding the balance installation should be low.

The temperature of the objects placed on either pans of the beam balance should be :

physics measurements and units measuring mass measurement of mass measuring instruments

  1. different

  2. same

  3. room temperature

  4. the respective freezing points

Show answer
Correct Option: C
Explanation:

The temperature of the objects placed on either pans of the beam balance should be room temperature.

The lever should be turned gently, in order to :

physics measurements and units measuring mass measurement of mass measuring instruments

  1. ensure that the motion is smooth and quiet

  2. prevent the knife edges from chipping

  3. avoid any jerk on the balance

  4. none of these

Show answer
Correct Option: B
Explanation:

The lever should be turned gently in order to prevent the knife edges from chipping.

The mass at the resting point gives the correct mass of the body, : 

physics measurements and units measuring mass measurement of mass measuring instruments

  1. if the resting point of a physical balance coincides with the zero resting point

  2. if the resting point of a physical balance coincides with a non-zero resting point

  3. if the resting point of a physical balance is tilted

  4. none of these

Show answer
Correct Option: A
Explanation:

The mass of the resting point gives the correct mass of the body if the resting point of a physical balance coincides with the zero resting point.

A balance to the true, must satisfy this condition: 

physics measurements and units measuring mass measurement of mass measuring instruments

  1. Both arms must be of equal lengths.

  2. Both arms must be made of same material.

  3. Both arms must be of same colour.

  4. Both pans must be of same mass.

Show answer
Correct Option: A,B,D
Explanation:

The conditions that a true balance must satisfy are that both arms must have equal lengths made up of same material and mass of the both pans must be same. Colour of arms has nothing to do with the measurement of mass.