How to Draw a Bulb

To draw a bulb, you can follow these steps:

Step 1: Draw the Bulb Shape
- Begin by drawing a rounded shape to represent the bulb itself. It should resemble an elongated oval or tear drop shape.
- Add a small circle on the top of the bulb to indicate the screw base.

Step 2: Add the Filament
- Inside the bulb shape, draw a wavy line to represent the filament. The filament is a thin wire that emits light when heated by the electric current.
- Make sure the filament is connected to the screw base at both ends.

Step 3: Draw the Glass Envelope
- Surround the bulb shape with a larger oval or teardrop shape to represent the glass envelope.
- The glass envelope is a protective covering that encloses the filament and prevents it from coming into contact with the air.

Step 4: Label the Parts
- Add labels to the different parts of the bulb.
- Label the bulb shape as "Bulb."
- Label the screw base as "Base."
- Label the wavy line inside the bulb shape as "Filament."
- Label the larger oval shape as "Glass Envelope."

Step 5: Optional Details
- You can add additional details to make the drawing more realistic, such as shading or reflections on the glass envelope.
- You can also draw the electrical connectors on the screw base to indicate how the bulb is connected to an electric circuit.

Electric Circuit Diagram using Symbols
- In an electric circuit diagram, symbols are used to represent different components.
- The symbol for a bulb is a circle with a cross inside, representing the filament.
- The screw base is represented by a horizontal line with two vertical lines at each end.

Electric Current and its Effects
- Electric current is the flow of electric charge through a conductor.
- It is represented by the symbol "I" and is measured in amperes (A).
- When electric current passes through a bulb's filament, it heats up and emits light.
- This is due to the effect of resistance, which causes the filament to heat up and glow.
- The brightness of the bulb depends on the amount of current flowing through it.