Answer to Question #251919 in Electric Circuits for zeina

Question

When the circuits Vb = v

then the value taken from the rheostats and the reading of the ammeter directly/ inversely/constant proportion??

Answer 1

Rheostat is a variable resistance which is used in the circuit to control the current.

$V=IR\implies I=V/R$

$So,$ the value taken from the rheostats and the reading of the ammeter is in inversely proportion.