Question

Four students recorded the readings of the current by observing the position of the pointer on the ammeter scale given below:



If there is no zero error, the correct reading of the current is :
(1) 2.3 A
(2) 5 A
(3) 2.0 A
(4) 2.05 A

Answer 1

As there is no zero error in the scale hence the scale reading will the actual reading.

Total number divisions on the scale = 30
The maximum value that can be measured = 3 A
Least count of the scale = 0.1 A

The correct reading of the scale = $23\times 0.1\text{A=}2.3\text{A}$

Hence the correct answer is option 1.