Electrical cells in series in Electricity Current and it’s Effects – Class 7 Science Experiment
Chapter Name: Electricity Current and it’s Effects
Activity Name: Electrical cells in series in Electricity Current and it’s Effects
Activity Description:
This experiment involves connecting a dry cell to a torch bulb using copper wires and observing the intensity of the light. Two scenarios are explored: one where a single cell is used, and another where two cells are connected in series to the bulb.
Required Items:
- Dry cells, torch bulb, copper wires.
Step by Step Procedure:
- Take a single dry cell and connect it to the torch bulb using copper wires.
- Observe the intensity of the light produced by the bulb.
- Connect two dry cells in series by connecting the positive terminal of the first cell to the negative terminal of the second cell.
- Connect the series arrangement of cells to the bulb using copper wires.
- Observe and compare the intensity of the light produced by the bulb in this case.
Experiment Observations:
- Note the intensity of light produced by the bulb when connected to a single cell and when connected in series with two cells.
Precautions:
Handle the dry cells and copper wires carefully. Make sure the connections are secure and proper to avoid accidents or short circuits.
Lesson Learnt from Experiment:
Connecting dry cells in series increases the voltage supplied to the bulb, resulting in a brighter glow compared to using a single cell. The arrangement of cells affects the intensity of the bulb’s light.
