Question 3 — Warm wire and deflected compass - Questions at the end of the chapter - Chapter 4 Class 8 - Electricity: Magnetic & Heating Effects(Curiosity)

Last updated at June 5, 2026 by

Q 3
Question

An electric current flows through a nichrome wire for a short time. (i) The wire becomes warm. (ii) A magnetic compass placed below the wire is deflected. Choose the correct option:

  • (a) Only (i) is correct
  • (b) Only (ii) is correct
  • (c) Both (i) and (ii) are correct
  • (d) Both (i) and (ii) are not correct

🔗 Concept: 4.2 Does a Current Carrying Wire Get Hot?

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(c) Both (i) and (ii) are correct.

Explanation

  • Current heats the wire, so it becomes warm.
  • Current also makes a magnetic field, so the compass deflects.
  • So both effects happen at the same time.
One current shows both the heating and magnetic effects.
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