Understanding the Circuit Diagram
To represent the circuit shown in figure 14.21 of the NCERT textbook, we will break down the essential components and their arrangement.
Components of the Circuit
- Battery: Provides the electrical energy. Represented by two parallel lines, one longer (positive) and one shorter (negative).
- Switch: Controls the flow of current. It can be shown as a break in the circuit with a lever.
- Resistor: Limits the flow of current. Represented by a zigzag line in the diagram.
- Connecting Wires: Conducts electricity between the components. Shown as straight lines connecting the various components.
Steps to Draw the Circuit Diagram
1. Draw the Battery: Start with the battery at the top left corner. Draw the positive and negative terminals.
2. Add the Switch: From the positive terminal, draw a line representing a wire leading to the switch. Place the switch after this wire.
3. Connect the Resistor: From the switch, draw another line leading to the resistor. The resistor should follow the switch in the circuit.
4. Complete the Circuit: Draw a line from the resistor back to the negative terminal of the battery, completing the circuit loop.
Final Touches
- Label each component clearly: Battery (B), Switch (S), and Resistor (R).
- Ensure the circuit flows in one direction, following conventional current flow from positive to negative.
This structured approach allows for a clear understanding of the circuit's functionality, demonstrating how electricity flows through each component effectively.

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