Question 7 โ€” Compass near the coil - Questions at the end of the chapter - Chapter 4 Class 8 - Electricity: Magnetic & Heating Effects(Curiosity)

Last updated at June 5, 2026 by

Q 7
Question

Look at Fig. 4.4a. If the compass near the coil deflects: (i) Draw an arrow to show the path of the current. (ii) Explain why the compass needle moves when current flows. (iii) Predict what happens to the deflection if you reverse the battery terminals.

๐Ÿ”— Concept: 4.1.1 Electromagnets

Show answer Hide answer
The current makes a magnetic field; reversing the terminals reverses the deflection.

Explanation

  • (i) The current flows from the positive terminal, through the coil, back to the negative terminal.
  • (ii) The current makes a magnetic field around the coil, which moves the compass needle.
  • (iii) Reversing the terminals reverses the current, so the needle deflects the other way.
Current makes the field; its direction sets the deflection direction.
Remove Ads Share on WhatsApp
CA Maninder Singh's photo - Co-founder, Teachoo

Made by

CA Maninder Singh

CA Maninder Singh is a Chartered Accountant with 16+ years of practical experience and 20+ years of teaching experience. At Teachoo, he simplifies Accounts, Tax and GST with step-by-step examples so students can apply concepts confidently in exams and real life.

For an uninterrupted learning experience, students can use Teachoo Black to remove ads and focus better.