Science 3 Marks Question

(i) Items Required:
1. Light bulb
2. Wires
3. Cells (A, B, C, D, E, F)
(ii) Procedure:
1. Connect the light bulb to one cell.
2. Check if the bulb glows. If it does, the cell is working.
3. Repeat the process for each cell (A, B, C, D, E, F).
(iii) Carrying Out the Activity:
1. Connect each cell one by one to the bulb.
2. The cells that make the bulb glow are working, and the ones that do not working.

1. Positive terminal
2. It supplies electrical energy to the circuit.
3. Positive terminal

1. Current electricity
2. To produce light
3. Battery

A battery is a device formed by connecting two or more cells together. To form a battery, the cells are placed in a cell holder so that the positive terminal of one cell is connected to the negative terminal of the next cell, and so on. A metal wire is connected to each of the two metal clips on the cell holder.

→ To begin, set up a simple circuit using a battery, a bulb with connecting wires, and alligator clips (if available). The circuit should have a gap where different materials can be tested.
→ Next, take each classroom material—such as a metal ruler, plastic pen, wooden pencil, paper clip, rubber eraser, and piece of paper—and place it in the circuit gap. Observe whether the bulb lights up or not.
→ If the bulb lights up, the material is a conductor, allowing electricity to flow through it easily; examples include metal rulers and paper clips. Conversely, if the bulb does not light up, the material is an insulator, hindering the flow of electricity; examples include plastic pens, wooden pencils, rubber erasers, and paper. By testing various materials, you can effectively categorize them based on their ability to conduct electricity.

self

(b) Reverse connection
(c) Works only in one direction
(a) Longer wire