Question

In an unbalanced Wheatstone bridge, which approach must be used to find the galvanometer current?

Options

• The simple product formula \[R_1 \times R_2 = R_3 \times R_4\]

• Kirchhoff's Voltage Law (KVL) equations for different loops

• The balance condition formula directly

• Ohm's law applied to the entire circuit only

Answer 1

In an unbalanced Wheatstone bridge, the balance formula cannot be directly applied because the bridge does not satisfy the balance condition. Instead, Kirchhoff's Voltage Law (KVL) must be applied to different loops in the circuit to set up a system of equations that can be solved to find the galvanometer current.