Question

There are 20 divisions between the zero (0) and 2A number of an ammeter. What is the least count of the ammeter?

• A. 0.01 A
• B. 0.1 A
• C. 0.001 A
• D. 2 A

Hint:

Least count is the smallest value an instrument can measure.

Answer 1

The Correct Option is A

Step 1: Formula.
Least count = Range / Number of divisions.
Step 2: Substitution.
Range = 2A, divisions = 200 (20 major × 10 small).
So least count = 2 / 200 = 0.01 A.
Step 3: Conclusion.
Thus, least count is 0.01 A.