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 60.4 V battery, one fixed resistor with resistance R1 = 1780 ?, and one potentiometer. In addition, one of the wires is grounded (at zero potential). The resistive material inside the potentiometer has a resistance of 475 ?/mm. A-To what distance x should the wiper be moved so that 10.8 mA of current passes through point B? x = mm B- With the wiper in this position, what is the potential at point B?

          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 60.4 V battery, one fixed resistor with resistance R1 = 1780 ?, and one potentiometer. In addition, one of the wires is grounded (at zero potential). The resistive material inside the potentiometer has a resistance of 475 ?/mm.

A-To what distance x should the wiper be moved so that 10.8 mA of current passes through point B?

x = mm

B- With the wiper in this position, what is the potential at point B?

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 60.4 V battery, one fixed resistor with resistance R1 = 1780 ?, and one potentiometer. In addition, one of the wires is grounded (at zero potential). The resistive material inside the potentiometer has a resistance of 475 ?/mm.

A-To what distance x should the wiper be moved so that 10.8 mA of current passes through point B?

x = mm

B- With the wiper in this position, what is the potential at point B?

Added by Dana G.

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