Question

The scale of an ammeter is shown below:



The least count of this ammeter is :
(1) 0.05 A
(2) 0.5 A
(3) 0.1 A
(4) 1 A

Answer 1

The least count of any device is given by the value measured by one single division on the scale of the device.

Total number of divisions on the scale = 30

Least count = $\frac{3\text{A}}{30}=0.1\text{A}$

Hence, the correct answer is option 3.