primary school students light bulb lights up electromagnet experiment science manual diy material electrical experiment set 2000g 小学生电灯泡亮了 电磁铁实验科学手工 diy材料电学实验套装2000G

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Product Name: KX1948 Electrical Experiment Set 2000G
Model Number: KX1948
Size: Packaging dimensions are 110*19*150 mm
Weight: Approximately 60g
Material: Battery case 1, battery 1, alligator clip 2, switch 1, light socket 1, bulb 1, wire 2, paperclip 2, iron wire 1, iron nail 1...
Color: Multicolor
Does it use a battery: Yes
Packaging: 240 pcs
Box dimensions: 600*450*550mm

The Electrical Experiment Set 2000G consists of a battery box, 1 battery, 2 alligator clips, 1 switch, 1 lamp base, 1 light bulb, 2 wires, 2 paper clips, 1 iron wire, and 1 iron nail. This set provides students with an understanding of the functions and applications of simple circuits commonly found in daily life. (This product must be used under parental or teacher supervision, and safety must be ensured during use.) Below are two experiments described!

1. Presentation on the lit small light bulb:

2. Electromagnet Course

1. Presentation on the lit small light bulb:

In daily life, batteries are often connected in series. The negative terminal of one battery is connected to the positive terminal of another, and the remaining positive and negative terminals form the positive and negative terminals of this battery pack. This method allows two, three, or more batteries to be connected in series.
The circuit formed by connecting electrical devices one by one with wires is called a series circuit.
Pattern of voltage for series light bulbs
Characteristics of series circuits
The switch controls the entire circuit regardless of its position, meaning its function is independent of where it is located. There is only one path for current; the current flowing through one light must pass through another light as well. If one light is turned off, the other light will also be turned off.

Scientific Principles:
In a series circuit, the current through each resistor is equal, and the voltage across all resistors adds up to the total circuit voltage. It can be seen that the voltage across each resistor is less than the total circuit voltage, hence the voltage division of series resistors occurs.
In a parallel circuit, the voltages across each resistor are equal, and the total current (current in the main path) equals the sum of the currents through each resistor. Therefore, the current through each resistor is less than the total current, which explains why resistors in a parallel configuration divide the current. The connection of resistors in series or parallel is similar to water flow: in a series connection, there is only one path, so the larger the resistance, the slower the flow; in a parallel connection, more branches result in a higher current.
Series connection of batteries
In daily life, batteries are often connected in series. The negative terminal of one battery is connected to the positive terminal of another, and the remaining positive and negative terminals form the positive and negative terminals of this battery pack. This method allows two, three, or more batteries to be connected in series.
Scientific Inquiry:
We often see electric lights in homes and classrooms in life; they turn on once the power is connected. How do they light up? Where does the electricity come from? Let’s explore through experiments the reasons behind the light emission of bulbs and how the circuits work.

Electromagnet Course

Key focus of the experiment: Students use the bell to end their classes every day on campus. How does the bell sound if no one presses it with hands? Some students may know that it’s due to an electromagnet, but how does an electromagnet make the bell produce sound? Let’s explore the working principle of an electromagnet through this experiment.

Experimental Objectives:

1. Learn how to make an electromagnet using iron nails
2. Understand the structure of electromagnets and their applications in daily life

Experimental magnetism: A device that generates electromagnetism when energized. A conductive winding matching its power is wound around the outside of the iron core. This coil with current has magnetism similar to a magnet, and it is also called an electromagnet. We usually shape it into a strip or paw-like form to make the iron core easier to magnetize. Electromagnets are an application of the magnetic effect of electric current and are closely related to daily life; they are devices that can generate magnetic force by passing current through them. They are non-permanent magnets, and their magnetism can be easily activated or removed. The working principle of an electromagnet: Simply put, it is the magnetic effect of electric current. When the coil is energized, the iron core inside is magnetized by the magnetic field of the wire tube. The magnetized iron core then becomes a magnet. As a result, due to the superposition of two magnetic fields, the magnetism of the wire tube is greatly enhanced. The iron core and armature in the electromagnet are magnetized, becoming two magnets with opposite magnetic properties, and an electromagnetic attraction is generated between them. An electromagnet uses the electromagnetic attraction produced by the current-carrying iron core coil to control mechanical devices and perform the desired actions.

Knowledge Expansion: The direction of the magnetic field of an electromagnet can be determined using Ampere's rule, which describes the relationship between the direction of current and the direction of the magnetic field lines generated by the current, also known as the right-hand rule. ① Ampere's rule for a straight wire with current (Ampere's rule 1): Hold a straight wire with current in the right hand, with the thumb pointing in the direction of the current, and the four fingers pointing in the direction of the magnetic field lines around the wire. ② Ampere's rule for a solenoid with current (Ampere's rule 2): Hold a solenoid with current in the right hand, bend the four fingers to align with the direction of the current, and then the end where the thumb points is the N pole of the solenoid. Electromagnets have many advantages: the presence or absence of magnetism can be controlled by the current in a closed or open circuit; the strength of magnetism can be controlled by the intensity of the current or the number of turns in the coil; the current can also be adjusted by changing resistance to control the magnetic strength; the poles can be controlled by changing the direction of the current, and so on. In other words, the strength of magnetism can be changed, its presence or absence can be controlled, the direction of the poles can be altered, and magnetism can disappear when the current is removed.

Do you know the applications of electromagnets in daily life?
1. Maglev train 2. Electric bell 3. Generator 4. Electric motor 5. Automatic control device

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Please check that the circuit is unobstructed and all components are intact before assembly, as well as ensure all contact points are properly aligned. During assembly, be careful not to let glue get on your clothes or skin. Keep the components out of reach for younger siblings to prevent them from accidentally swallowing them! Do not play with them on your head, as the model may fall and hurt you!