explain about Least Count Error.
Answers
Explanation:
The smallest value that can be measured by the measuring instrument is called its least count.All the readings or measured values are good onlyup to this value.
The least count error is the error associated with the resolution of the instrument.For example, a vernier callipers has the leastcount as 0.01 cm; a spherometer may have aleast count of 0.001 cm. Least count error belongs to the category of random errors but within a limited size; it occurs with both systematic and random errors. If we use a metrescale for measurement of length, it may have graduations at 1 mm division scale spacing or interval.
Using instruments of higher precision.improving experimental techniques, etc., we can reduce the least count error. Repeating the observations several times and taking the arithmetic mean of all the observations, themean value would be very close to the true valueof the measured quantity.