mermaid
graph LR
    B(Battery 9V) -->|+| S(Switch)
    S --> R(Resistor 100 Ohms)
    R --> L(LED)
    L -->|-| F(Fuse)
    F --> P1(Probe 1)
    P2(Probe 2) -->|-| F
    P1 --> P2
    P2 -.->|+| B
    classDef default fill:#f9f,stroke:#333,stroke-width:2px;
    class B,S,R,L,F,P1,P2 default;

This diagram represents a continuity tester circuit with labeled components:

• Battery 9V (B): Provides power to the circuit.
• Switch (S): Controls the flow of current.
• Resistor 100 Ohms (R): Limits the current to protect the LED.
• LED (L): Lights up to indicate continuity.
• Fuse (F): Provides additional protection against overcurrent.
• Probes (P1 and P2): Used to test continuity across points in the circuit.

The circuit is designed to light up the LED when the probes (P1 and P2) detect continuity, indicating a closed circuit.