Wheatstone Bridge

	V_in [Volt]
	R_a [Ohm]
	R_b [Ohm]
	R_c [Ohm]
	R_x [Ohm]
	V_b [Volt]

Input range:

Condition for V_b = 0 is:

Voltage across V_b is:

The Wheatstone bridge is used extensively to measure the resistance of an unknown resistor. By changing the potentiometer value R_x until the voltage across V_b is equal to 0. then the value of the unknown resistor R_b can be determined by the formula: