Question

Why do bulb have two terminals ?

Answer 1

1. Every electric appliances or component have two terminals, one is a positive terminal and another is a negative terminal.
2. Every electrical component has two terminals, one for sending electricity to the device and the other for receiving it.
3. There is no way a device can have only one terminal.
4. The positive terminal sends electric current and the current across the electrical circuit goes to the negative terminal of the component.
5. The filaments of the bulb are connected with the two terminals and pass the current and bulb gets glow.