A magnetic needle, like the one in a compass, is a small magnet pivoted to rotate freely. When placed in a magnetic field, it aligns itself with the direction of the field lines, indicating the presence and direction of the field.
The presence of magnetic field can be determined using which one of the following instruments?
Asked in UPSC NDA 2 2022 · Topic: Measuring Instruments and Scales (Galvanometer: principle, sensitivity, and conversion to Ammeter and Voltmeter)
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