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    Physics
    Grade-10
    Easy

    Question

    The presence of a magnetic field at a point can be checked by:

    1. A current-carrying wire
    2. A galvanometer
    3. A magnetic needle
    4. A strong magnet

    hintHint:

    • A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. 

    The correct answer is: A magnetic needle

      • A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.
      • The presence of magnetic field at a point can be detected by a compass needle. In the presence of a magnetic field, the needle of compass rests only in the direction of magnetic field and in the absence of any magnetic field, the needle of the compass can rest in any direction

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