You are given four ammeters A, B, C and D having least counts mentioned below:
(I) Ammeter A with least count 0.25 A
(II) Ammeter B with least count 0.5 A
(III) 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
Dear student,
As we know that equivalent resistance of the resistances in parallel will be less than that of resistances connected in series.
So, for a fixed voltage , current flowing in the circuit will bw very high. so we need an ammeter with high value of least count.
From the options, ammeter A has highest least count. so option (a) will be correct.
Regards
As we know that equivalent resistance of the resistances in parallel will be less than that of resistances connected in series.
So, for a fixed voltage , current flowing in the circuit will bw very high. so we need an ammeter with high value of least count.
From the options, ammeter A has highest least count. so option (a) will be correct.
Regards