Advertisements
Advertisements
प्रश्न
Answer the following in short.
Explain the working of a beam balance.
Advertisements
उत्तर
A beam balance is the simplest instrument to measure mass (weight). In a beam balance, the mass of an object is measured by comparing it with standard masses called standard weights. A simple beam balance consists of a straight beam of metal (generally iron), supported at its centre with the help of an iron loop. A pointer is fixed at the centre of the iron loop. Two identical pans are suspended at equal distances from the centre, at the two ends of the beam.
Working: The object whose mass has to be measured is placed on one of the pans (generally the right pan). Standard weights are placed on the other pan until the metallic beam becomes hori7ontal and the pointer becomes vertical. The sum total of all weights used gives the mass of the object.
APPEARS IN
संबंधित प्रश्न
The unit of length convenient on the nuclear scale is a fermi : 1 f = 10– 15 m. Nuclear sizes obey roughly the following empirical relation : `r = r_0A^(1/3)` where r is the radius of the nucleus, A its mass number, and r0 is a constant equal to about, 1.2 f. Show that the rule implies that nuclear mass density is nearly constant for different nuclei. Estimate the mass density of sodium nucleus. Compare it with the average mass density of a sodium atom obtained in Exercise 2.27
Fill in the blank.
The amount of matter contained in a body is known as its ...........
Name the device commonly used to measure mass.
______ is used to measure mass.
Amount of matter:: mass: Gravitational Pull:: ______.
Give an example of a device used to find the accurate measurement of weight.
Where are the electronic balances used?
The unit is used to measure mass ______.
What is the standard unit of mass?
Write a short note on the following:
Common (beam) balance:
