why does the deflection increases dramatically when an iron rod is inserted into the coil along its axis
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When an iron rod is inserted between the coils the magnetic flux through coils increases. This happens because iron is a ferromagnetic substance and it lets more number of magnetic lines of force to pass through it.
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The deflection increases dramatically when an iron rod is inserted into the coil along its axis as induced emf increases.
Reason for change in deflection
- The magnetic flux across the coils rises when an iron rod is put between them.
- Inserting an iron rod increases the deflection inside the coil.
- Because iron is a ferromagnetic material, it allows for a greater number of magnetic lines of force to flow through it.
- As the flux rises, the induced emf rises with it, and the galvanometer's deflection rises with it.
Hence, deflection increases when iron rod is put along axis.
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