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State the principle of moving coil galva...

State the principle of moving coil galvanometer.

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**Step-by-Step Solution:** 1. **Understanding the Galvanometer**: A moving coil galvanometer is an instrument used to measure small electric currents. It operates based on the interaction between a magnetic field and a current-carrying coil. 2. **Current Flow**: When an electric current flows through the coil of the galvanometer, it creates a magnetic field around it. This is due to the principle of electromagnetism, where an electric current generates a magnetic field. 3. **Magnetic Field Interaction**: The galvanometer is placed in an external magnetic field. The magnetic field produced by the coil interacts with the external magnetic field. ...
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