To draw a circuit diagram for a simple setup where one lamp is controlled by one switch, follow these steps:
1. **Components Needed:**
- One lamp (represented by a light bulb symbol)
- One switch (represented by a switch symbol)
- A power source (such as a battery or AC supply)
2. **Circuit Diagram:**
Here is a textual representation of the circuit diagram:
```
+ ----- Switch ----- Lamp ----- -
| |
| |
Power Source |
| |
| |
+ ------------------------------ -
```
**Explanation:**
- **Power Source**: This can be represented by a battery symbol (for DC) or an AC power source symbol. It provides electrical power to the circuit.
- **Switch**: This component is used to open or close the circuit. When the switch is closed, it completes the circuit and allows current to flow through the lamp, causing it to light up. When the switch is open, it breaks the circuit, stopping current flow and turning the lamp off.
- **Lamp (Light Bulb)**: This is the load in the circuit. It lights up when current flows through it.
3. **Detailed Description:**
- **Power Source**: In the diagram, the power source has two terminals: positive (+) and negative (-). For an AC supply, the terminals are typically represented as hot (live) and neutral wires.
- **Switch**: A single-pole, single-throw (SPST) switch is used in this circuit. It has two positions: ON (closed) and OFF (open).
- **Lamp**: The lamp or light bulb is connected in series with the switch. This means the current flowing through the switch also flows through the lamp.
4. **Connections:**
- **Positive Terminal of Power Source**: Connect this to one terminal of the switch.
- **Other Terminal of the Switch**: Connect this to one terminal of the lamp.
- **Negative Terminal of Power Source**: Connect this to the other terminal of the lamp.
This simple circuit diagram illustrates how a lamp can be controlled with a single switch. When the switch is closed, current flows from the power source through the lamp, causing it to light up. When the switch is open, the circuit is incomplete, and the lamp remains off.