Question

What is the galvanometer current in a balanced Wheatstone bridge?

Options

• Maximum

• Equal to the battery current

• Zero

• Half the battery current

Answer 1

In a balanced Wheatstone bridge, the galvanometer current is zero. This is the defining characteristic of a balanced bridge—no current flows through the galvanometer because the potentials at the two galvanometer junctions are equal, resulting in zero potential difference across it.