Least count of spring balance, if spring balance has a range of 0-25 kg and consists of every kg increment in weight the needle moves by 10 divisions. Find the position and the nature of the image formed.

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100 g/mm

0.0001 g/mm

0.01 g/cm

1 g/m

answer is A.

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Detailed Solution

Concept: A spring balance is a weighing instrument that correctly measures the weight of items. A spring balance is a weighing instrument that correctly measures the weight of items. A spring balance is made up of a fixed spring on one end and a hook on the other end for attaching an object. It is based on Hooke's Law, which asserts that when a force is applied to stretch a spring, the distance the spring is stretched from its rest state is proportional to the force applied. The scale markings on the spring balance are always evenly spaced as a result of this.
Now we know that the least count of a measuring instrument is the least value of a physical quantity that can be measured accurately using the instrument. The least count of any measuring scale depends on the number of divisions that when the number of divisions is increasing the least count decreases in a similar fashion.
Least count = 1kg/10 =0.1 kg/ div or 100 g / div is the least count of this instrument.
Hence, option 1 is correct.

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