Balanced Bridge - Electronic Circuits II Step by Step

A bridge is balanced when two divider nodes have the same exact voltage. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

The left divider output is exact

The left divider output is 8 volts.

V_{\text{left}} = 8\ \text{V}

The right divider output matches

The right divider output is also 8 volts, so the bridge meter reads 0 volts. The bridge voltmeter is ideal and does not load the bridge.

V_{\text{bridge}} = 0\ \text{V}