You are given four ammeters A, B, C and D having least counts mentioned below:

(1) Ammeter A with least count 0.25 A

(ll) Ammeter B with least count 0.5 A

(Ill) Ammeter C with least count 0.05 A

(IV) Ammeter D with least count 0.1 A

Which of the ammeters would you prefer for doing an

experiment to determine the equivalent resistance of two

resistances most accurately, when connected in parallel?

(a) Ammeter A

(b) Ammeter B

(c) Ammeter C

d) Ammeter D

Ammeter A with least count 0.25 A

(a) is correct option.

Explanation:

Given that,

Four ammeters A, B, C and D having least counts.

least count of ammeter A = 0.25 A

least count of ammeter B = 0.5 A

least count of ammeter C = 0.05 A

least count of ammeter D = 0.1 A

We need to find the  which ammeter  

Using given data

When the resistance connectected in a parallel connection then the current flowing through the circuit is large.

So, we will need an ammeter which the least count is high for measuring current.

We use ammeter with higher least count value.

Hence, Ammeter A with least count 0.25 A

(a) is correct option.