Carey Foster Bridge: Galvanometer & Its Opposite Deflections

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SUMMARY

The Carey Foster Bridge utilizes a galvanometer to measure small voltage differences, resulting in opposite deflections at both ends due to the arrangement of resistances in the circuit. The deflection occurs when the voltage across the galvanometer changes based on the resistance values, which can be manipulated to create the necessary conditions for opposite readings. Understanding the principles of voltage division and resistance combinations is crucial for grasping the behavior of the galvanometer in this setup. For a comprehensive explanation, refer to the provided PDF resource from BIT Mesra.

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  • Understanding of basic electrical circuits
  • Knowledge of galvanometers and their operation
  • Familiarity with resistance and voltage concepts
  • Ability to interpret circuit diagrams
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  • Study the principles of voltage division in electrical circuits
  • Learn about the construction and working of galvanometers
  • Explore the Carey Foster Bridge setup in detail
  • Investigate the effects of resistance combinations on circuit behavior
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Students studying physics, particularly those focusing on electrical circuits, educators teaching circuit analysis, and anyone interested in practical applications of galvanometers in measurement systems.

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why galvanometer gives opposite deflection on both of its ends in Carey Foster Bridge ?give me its full explanation and its reasons?
 
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Given the terse way you posted the question - and that it looks like a school/homework question, I can guess you might be short of answers. I will go as far as providing you http://www.bitmesra.ac.in/departments/laboratory/physics/03%20&%2013%20Carey%20Foster%20bridge.pdf" .
It is a PDF file which, aside from the full explanations, has a graphic of a Carey-Foster bridge laid out.

Consider carefully what it takes to make a galvanometer deflect backwards in both those places. Then think what combinations of resistances, including the wire, would make voltages appear at those places to have that effect.

If this was a homework - type question, then this was not the place to post it! If inadvertently done, then try again in the place in the forum where lots of help will be available, provided you set out fully what you have tried, and what you understand of it so far.
 
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Thread moved to Homework Help -- Intro Physics.
 

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