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Electricity and Magnetism — PHYSICS STD 7 — Question

ICSE BoardEnglish MediumSTD 7PHYSICSElectricity and Magnetism5 Marks
Question
How will you test whether a given rod is a magnet or not ?
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Answer

Aim— To test whether a given rod is a magnet or not.
Apparatus —
  1. rod to be tested
  2. a bar magnet
  3. a stand
  4. a thread
Procedure —
  1. Suspend the rod to be tested with a thread on the stand.
  2. Bring the bar magnet near the rod with its north pole towards the rod’s end.
  3. Observe.
Inference — In every case, the magnet comes to rest in a north- south direction which shows its directive property.
Observation and Inference —
— If the rod is attracted towards the bar magnet, the rod may be magnet or not.
— But if the rod remains in the same direction of rest as in the start of the experiment, it show it is not a magnet.

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