#1 Circuitos Elétricos em Série - IFÍSICA

Summary

In this tutorial, the speaker demonstrates how to build a simple series circuit using lamp sockets, a switch, wires, and light bulbs. The process involves connecting the components in series, where each socket and wire is carefully joined to ensure a complete circuit. After assembling the circuit, the speaker shows how the lamps behave when the switch is turned on, explaining how the electrical current is shared equally among the bulbs. The video emphasizes the importance of understanding how the current divides and the behavior of the circuit when a bulb is removed.

Takeaways

• 😀 To build a series circuit, you'll need lamp sockets, a switch, copper-wrapped wires, light bulbs of your choice, screwdrivers, and a board for support.
• 😀 It's important to prepare the copper wires by stripping their ends, which can be done easily with scissors or by making small holes and pulling the wire.
• 😀 The lamp sockets are connected one by one using the stripped copper wire ends, making sure to secure them with screws.
• 😀 Once the first two sockets are connected, the process continues by connecting a third socket in a similar fashion.
• 😀 There are three wires involved: one that connects the switch, another that connects the circuit, and one that connects the light bulbs.
• 😀 The switch connects one wire that leads to the circuit, while another separate wire is connected to the light bulb holder.
• 😀 A third wire is attached to complete the connection between the circuit and the light bulbs, allowing the current to pass through.
• 😀 The system is now a closed circuit where the current flows through the connected wires, powering the light bulbs once plugged in.
• 😀 If one bulb is removed, all bulbs go out because the current no longer has a continuous path to travel.
• 😀 After completing the setup, the circuit is tested by turning on the switch, and the video concludes with a reminder to check the circuit before use.

Q & A

What materials are required to build the circuit in series?

The materials required include three sockets (lamp holders), a switch, copper wires, light bulbs of the desired power, screwdrivers, a Phillips screwdriver, and a board to serve as the circuit's support.

How do you prepare the copper wires for the circuit?

The copper wires are cut and the ends are stripped, which can be done using scissors or by creating small holes and pulling off the insulation. This ensures a clean connection when wiring the components.

What is the purpose of the screws in the sockets?

The screws in the sockets are used to connect the stripped ends of the copper wires. This allows for the wires to be securely attached to the socket, ensuring proper electrical contact.

How do you connect the sockets in series?

To connect the sockets in series, you attach one wire from a socket to another, making sure that each socket is connected in sequence to the next. The wires are connected to the terminals of the sockets using screws.

What is the role of the switch in the circuit?

The switch is used to control the flow of electricity in the circuit. It interrupts the current, allowing you to turn the circuit on or off. In this setup, it’s connected to one of the wires leading to the lamp holders.

Why do the light bulbs not shine brightly in the circuit?

The light bulbs don’t shine brightly because in a series circuit, the current is divided among all the connected components. Each bulb gets a portion of the voltage, resulting in dimmer lighting.

What happens if you remove one of the light bulbs from the circuit?

If one bulb is removed, all the bulbs in the series circuit will go out. This is because the current has only one path to flow, and removing a bulb breaks that path, interrupting the circuit.

How does the current behave in a series circuit with multiple bulbs?

In a series circuit, the current remains the same throughout, but the voltage is divided equally among all the bulbs. This results in reduced brightness for each bulb as compared to a parallel circuit.

What would happen if you used light bulbs of different wattages?

Using light bulbs of different wattages in a series circuit would result in uneven voltage distribution, causing bulbs with lower wattages to be dimmer. The bulbs would still function, but their brightness would vary.

Why is the circuit referred to as 'closed' after the setup?

The circuit is considered 'closed' because all components are connected, and the flow of current is continuous. The switch, when turned on, allows the current to flow through the entire circuit and power the bulbs.