- #31
gracy
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So,why the gap does not appear in case of 2 and 3 as in 1 and 4?
Potentiometer and galvanometer experiment
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SUMMARY
The forum discussion centers on the principles of using a potentiometer and galvanometer to measure potential differences. It establishes that when the potential difference across two points is zero, the galvanometer will show zero deflection. The conversation highlights the importance of negligible resistance in connecting wires and the internal resistance of the galvanometer, which must match the resistance in the circuit for accurate readings. Participants emphasize the necessity of clear circuit diagrams to avoid confusion in understanding these concepts.
PREREQUISITES- Understanding of galvanometer operation and zero deflection principle
- Knowledge of potentiometer functionality and its application in measuring voltage
- Familiarity with circuit diagrams and electrical resistance concepts
- Basic comprehension of potential difference and its implications in electrical circuits
- Study the operation of a potentiometer as a measuring instrument
- Learn about the internal resistance of galvanometers and its impact on measurements
- Explore circuit diagram conventions and how to interpret them correctly
- Investigate the relationship between resistance and potential difference in electrical circuits
Students preparing for physics exams, educators teaching electrical concepts, and anyone interested in understanding the practical applications of potentiometers and galvanometers in measuring voltage.
- #32
Bystander
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Ahah! The light dawns. Drawing "conventions" in schematic diagrams --- I parenthesize the word "conventions" because they aren't universally or uniformly applied/used: 1) lines indicating wiring between components in a circuit can intersect without indicating a connection between the two wires represented by the lines; 2) a situation where there is no connection can be indicated by the small semi-circle just to the left of the galvanometer in the schematic (it implies the one wire "jumping" over the other, a short break in one line, a dashed line, different line weights/widths, different shading; 3) you will also see schematics where lines cross each other, and connections are specifically indicated by heavy dots at the intersections, leaving you to infer that there is no connection where no dots are shown at intersections. It just looks like the "3" gap is bridged by the cell, and the "2" gap by a wire until I tell you that the "semi-circle" indicates that the two wires are not connected.gracy said:
- #33
NascentOxygen
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A grouping of 4 sockets for a pair of jumpers is just inviting trouble!
Why not just draw like this, and you choose to either drop the cell into the circuit as shown, or else reversed. Too straightforward? oo)
Why not just draw like this, and you choose to either drop the cell into the circuit as shown, or else reversed. Too straightforward? oo)