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In a deflection magnetometer, the needle...

In a deflection magnetometer, the needle is short and the pointer is long because, the

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To answer the question regarding why the needle is short and the pointer is long in a deflection magnetometer, we can break down the explanation into two parts: ### Step 1: Understanding the Needle The needle in a deflection magnetometer is short. This is because a short magnetic needle is less affected by the Earth's magnetic field and can respond more quickly to the magnetic field produced by the current in the coil. The small size allows the needle to pivot freely without being overly influenced by external magnetic disturbances. ### Step 2: Understanding the Pointer The pointer in a deflection magnetometer is long. This design choice is made so that the pointer can be held fixed and perpendicular to the magnetic needle. A longer pointer allows for better visibility and accuracy when reading the angle of deflection on the circular scale. The length of the pointer ensures that even a small deflection of the needle can be easily observed. ### Conclusion In summary, the short needle allows for quick and accurate response to magnetic fields, while the long pointer enhances visibility and precision in measurement. ---
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