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🔬 Science - Class 9
Unit 11 · Electricity

Heating Effect of Electric Current and Electric Power

ScienceSubject
8 minEstimated read
क्रियाकलाप 11.6

Observing how warm a torch bulb becomes

Method
  • Take a torch bulb, two dry cells, a switch and connecting wires.
  • Connect them all to make an electric circuit.
  • Switch on, and after some time switch off and observe how hot the bulb is.
  • Discuss the reason for what you observe.
Discussion
  • Why is the bulb found to be warm after it is switched off?
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