Question

the length of a linear rod is measured a 100.1 cm. The approximate error in the measurements is

Answer 1

Answer:

Maximum approximate error = 0.05 cm

Explanation:

Length of rod is measured = 100.1 cm

When the number is mentioned upto 1st decimal place, it means it is rounded off for the 2nd number.

That means, all numbers below can be rounded off to 100.1 cm

i.e. - 100.05 to 100.14 can be rounded off to 100.1

That means maximum approximate error can be = 100.1 - 100.05 = 0.05 cm

Maximum approximate error = 0.05 cm

Answer 2

Answer:

The approximate error is +0.1 or -0.1

Explanation:

Since:

we know that according to definition of significant digit in the measurements

                                       "significant digits"

"The accurately known digits and first doubt full digit are called significant digits of measured value"

Therefore in the measured value 100.1 cm,the last digit must be doubt full which is "0.1"

So the approximate error is +0.1 or -0.1.