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Two 1k2 resistors are connected in series from point A to point B; their junction is labelled C. Two more resistors are connected in series from A to B; their junction is labelled D. A to D is a 1 kN resistor while D to B is an unknown resistor R. A galvanometer is then connected between C and D, and a battery is connected across A and B. Finally, a potentiometer consisting of a 20 cm length of high-resistance wire, 25 k2m-1, with a sliding contact is connected, the bottom of the wire to B and the slider to D, in parallel to R. When the slider is 8 cm from the bottom, the galvanometer reads zero. i) Draw the circuit diagram. ii) Calculate the value of the unknown resistor R.

Two 1k2 resistors are connected in series from point A to point B; their junction is labelled C. Two more resistors are connected in series from A to B; their junction is labelled D. A to D is a 1 kN resistor while D to B is an unknown resistor R. A galvanometer is then connected between C and D, and a battery is connected across A and B. Finally, a potentiometer consisting of a 20 cm length of high-resistance wire, 25 k2m-1, with a sliding contact is connected, the bottom of the wire to B and the slider to D, in parallel to R. When the slider is 8 cm from the bottom, the galvanometer reads zero. i) Draw the circuit diagram. ii) Calculate the value of the unknown resistor R.

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Two 1kN resistors are connected in series from point A to point B; their junction is labelled C. Two more resistors are connected in series from A to B; their junction is labelled D. A to D is a 1 kN resistor while D to B is an unknown resistor R. A galvanometer is then connected between C and D, and a battery is connected across A and B. Finally, a potentiometer consisting of a 20 cm length of high-resistance wire, 25 kNm-1, with a sliding contact is connected, the bottom of the wire to B and the slider to D, in parallel to R. When the slider is 8 cm from the bottom, the galvanometer reads zero. i) Draw the circuit diagram. ii) Calculate the value of the unknown resistor R.
Transcribed Image Text:Two 1kN resistors are connected in series from point A to point B; their junction is labelled C. Two more resistors are connected in series from A to B; their junction is labelled D. A to D is a 1 kN resistor while D to B is an unknown resistor R. A galvanometer is then connected between C and D, and a battery is connected across A and B. Finally, a potentiometer consisting of a 20 cm length of high-resistance wire, 25 kNm-1, with a sliding contact is connected, the bottom of the wire to B and the slider to D, in parallel to R. When the slider is 8 cm from the bottom, the galvanometer reads zero. i) Draw the circuit diagram. ii) Calculate the value of the unknown resistor R.
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