Question

A potentiometer is essentially a resistor with three contacts, one of which is mobile. It acts as a variable resistor, since changing the position of the mobile contact, called the "wiper" (denoted by an arrow), changes the amount of the resistor through which current must pass. The circuit shown consists of one 93.7 V battery, one fixed resistor with resistance Ri = 1780 N, and one potentiometer. In addition, one of the wires is grounded (at zero potential). The resistive material inside the potentiometer has a resistance of 4752/mm. To what distance should the wiper be moved so that 16.8 mA of current passes through point B? מומו With the wiper in this position, what is the potential at point B? potential:

Answer 1

Rx = (4752) 2 R = 27802 V=93.7 volt in the RtRx= - Ra=X - R2 (4752) = 93.7.-1780 16.8x103 312=7.9945 mm Up=o- iRo --(16.8x103) (1780) --ELO = -29.904 volt / # in parallel with 2 = 1 same botential acress them # parallel with 8 =) 19,6,5 # in parallel with 11 9 74 # Not in parallel with any 13 All the Best