Consider the circuit shown in the figure above. The ammeters and the battery hav
ID: 2256525 • Letter: C
Question
Consider the circuit shown in the figure above. The ammeters and the battery have negligible internal resistanves. The current in the ammeter A1 is 4.0 Ampheres. The current in the ammeter A2 is 2.0 Amperes. The resistance R and the electromotive force ? of the battery next to the 3? resistance are unknown.
a) Find the reading of the ammeter A
b) Find the potential difference between points a and b
c) Find the unknow resistance R
d) Find the unknown electromotive force ?
Consider the circuit shown in the internal resistances. The current in the A2 is 2.0 Amperes. The resistance R resistance are unknown.Explanation / Answer
Net current in the curcuit, I = A1 + A2 = 4 + 2 = 6 A
Thus, reading of ammeter A = 6 Amperes
Potential difference between a and b
= 46 - 6*I
= 46 - 6(6)
= 10 V
unknown resistance R
= V/I1
= 10/4
=2.5 ohm
Unknown electromotive force E
= 10 - 3*2
= 4 V