Step 1:
\Observe the circuit,
\Potential at
is
and Potential at
is
.
Find the terminal differece of the circuit.
\
.
Voltage at the battery is
.
Find the resultant voltage at the amperemeter
.
Find the current at the amperemeter.
\Ohms law:
.
Substtitute
and
in the above expression.

A.
Solution:
\Current passing through the amperemeter is
A.
\
\