Question 7 — Vidyut has made the circuit as - Questions at the end of the chapter - Chapter 3 Class 7 - Electricity: Circuits and their Components

Last updated at August 17, 2026 by

Q7 (Difficult): Vidyut has made the circuit as shown in Fig. 3.19. Even after closing the circuit, the lamp does not glow. What can be the possible reasons? List as many possible reasons as you can. What will you do to find out why the lamp did not glow?

Answer:
We have studied that complete circuit with working components is needed for current flow . This is why multiple factors can prevent lamp from glowing.

  • Cell may be discharged or wrongly connected
  • Lamp filament may be broken or fused
  • Wire connections may be loose or broken
  • Switch may be faulty or damaged

Conclusion: Check each component systematically to find the problem.

Troubleshooting Non-working Circuit Check Cell Test with working lamp Check Lamp Test with working cell Check Wires Look for breaks/loose ends Check Switch Ensure proper contact Check Connections Verify all joints tight
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