The presence of magnetic field can be determined using which one of the following instruments?
[amp_mcq option1=”Ammeter” option2=”Voltmeter” option3=”Magnetic needle” option4=”Motor” correct=”option3″]
This question was previously asked in
UPSC NDA-2 – 2022
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.