2–67 Figure P2−67 shows a voltage bridge circuit, that is, two voltage dividers in parallel with a source vS. One resistor RX is variable. The goal is often to “balance”

the bridge by making vx = 0 V. Derive an expression for RX in terms of the other resistors for when the bridge is balanced.

Transcribed Image Text:

(+1 RA Rc RB Rx FIGURE P2-67