Chapter 12 · Magnetic Effects of Electric Current

NCERT Class 10 Science Chapter 12 Intext Questions (Page 196)

All 1 questions of NCERT Class 10 Science Chapter 12 Intext Questions (Page 196) — Magnetic Effects of Electric Current — in the book's order, each with its answer and a step-by-step solution.

1. Q1
   Why ​does ​a ​compass needle get ​deflected when ​brought ​near a ​bar ​magnet?
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   The needle is a small magnet, so the bar magnet's field exerts opposite forces on its poles and turns it along the field.

   A compass needle is itself a small bar magnet with a north pole and a south pole. A bar magnet has a magnetic field in the space around it, so when the compass is brought near, the field exerts a force on each pole of the needle — the needle's north pole is repelled by the magnet's north pole and attracted by its south pole, and the needle's south pole is acted on the opposite way. These two opposite forces act at the two ends of the pivoted needle and so turn it. The needle is deflected from its usual north–south position and comes to rest pointing along the direction of the magnetic field at that place.

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