The smallest value that can be measured by an instrument is called its * (a) zero value (b) absolute value (c) true value (d) least count
Answers
Answer:
The smallest value that can be measured by an instrument is called its least count
Answer:
The correct answer is option (d) least count.
Explanation:
The least count of an instrument is defined as the minimum value or smallest value it can measure accurately. Every physical instrument has its least count.
Formula for finding least count of any device is given below:
Least count = Pitch/Number of divisions on the amallest scale
where Pitch = Distance moved in one movement.
For example, if I talk about Vernier Calliper (an instrument used to measure small lengths), its least count is given by
Least count = Value of main scale division/Number of divisions on Vernier scale
Least count = 0.01 cm
The physical meaning of above line is that the smallest value vernier calliper can measure is 0.01 cm.
Similarly we can easily find out the least count of any device.
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