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प्रश्न
By reversing the direction of current in a wire, the magnetic field produced by it:
विकल्प
Gets reversed in direction
Increases in strength
Decreases in strength
Remains unchanged in strength and direction
उत्तर
By reversing the direction of current in a wire, the magnetic field produced by it gets reversed in direction.
Hint: On reversing the direction of current in a wire, the polarity of the faces of the wire also reverses. Thus, the direction of magnetic field produced by it also gets reversed.
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