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Product Name: KX1949 Magnet and Current Mixing Kit

Product Code: KX1949
Size: Packaging dimensions 150*22*196mm
Weight: About 130g
Material: Battery case 1 + Battery 1 + Crocodile clip 2 + Switch 1 + Lamp base 1 + Bulb 1 + Wire 2 + Paper clip 1 + Iron wire 1 + Nails 1 + Blades 1 + Motor 1 + Magnets 4..
Color: Multi-color
Is the device powered by batteries? Yes.
Packing: 240pcs
Box Specification: 600*450*550mm

The magnet and current mix box set consists of a battery box, 1 battery, 2 alligators clamps, 1 switch, 1 lamp base, 1 bulb, 2 wires, 1 paperclip, 1 iron wire, 1 nail, 1 fan blade, 1 motor, and 4 magnets. This set is a scientific laboratory kit that allows students to understand the function and application of common simple circuits in our daily lives, as well as the application of magnetism and magnetic fields, and the principles and applications of fans. (This product must be used under the supervision of parents or teachers, and safety must be carefully observed when using it). Below are the introductions to 3 experiments!

1. Small Light Bulb Illuminated Course:
Electromagnetic Induction Course
3. Electric Fan

1. Small Light Bulb Illuminated Course:

In life, batteries are often used in series. Connect the negative terminal of one battery to the positive terminal of another, and the remaining positive and negative terminals will be the positive and negative terminals of the battery group. This way, you can connect two, three, or more batteries in series. A circuit formed by connecting electrical appliances one by one with wires is called a series circuit.
The voltage of a series of light bulbs follows a certain pattern. The characteristics of a series circuit include the fact that a switch can control the entire circuit regardless of its position, meaning its function is independent of its location. Current flows through only one path, and the current passing through one light bulb must pass through the other. If one light bulb is turned off, the other will also go out.

Scientific Principles:
In a series circuit, the current through each resistor is equal, and the sum of the voltages across each resistor equals the total circuit voltage. It can be known that the voltage across each resistor is less than the total circuit voltage, so the series resistors share voltage. In a parallel circuit, the voltages across each resistor are equal, and the sum of the currents through each resistor equals the total current (dry circuit current). It can be known that the current through each resistor is less than the total current (dry circuit current), so the parallel resistors share current. The series and parallel connections of resistors are like water flow, where in series there is only one path, the larger the resistance, the slower the flow, and the more branches in parallel, the larger the current. In daily life, batteries are often connected in series to use. Connect the negative pole of one battery to the positive pole of another, and the remaining positive pole and negative pole are the positive and negative poles of this battery group. In this way, two, three, or more batteries can be connected in series. Scientific investigation: In daily life, it is often seen that the electric lights in homes and classrooms can light up after being connected to the power supply. How does it work? Where does the electricity come from? Now we will understand the reason for the bulb to glow and how the circuit is connected through experiments.

Electromagnetic Induction Course

Experimental Focus: Every day on campus, students hear the school bell ringing for classes and recess. How can an electric bell make a sound without being struck by hand? Some students may know it's because of an electromagnet, but how does an electromagnet make the electric bell produce sound? Let's understand the working principle of an electromagnet through the experiment below.
Experimental Objective: 1. Learn to make an electromagnet with a nail.
2. Understanding the structure of electromagnets and their applications in daily life

Experimental Cognition: A device that produces electromagnetic force when electric current is passed through it. By winding a conductive coil around the iron core, which matches its power, the coil, like a magnet, becomes magnetic. It is also known as an electromagnetic iron. We usually make it into a bar or hoof shape to make the iron core easier to magnetize. The electromagnetic iron is an application of the magnetic effect of electric current, which is closely related to life; the electromagnetic iron is a device that can produce magnetic force by passing current, which is not a magnet and can easily start or eliminate its magnetic properties. The working principle of the electromagnetic iron: In simple terms, it is the magnetic effect of electric current. When the coil is powered, the iron core inside is magnetized by the magnetic field of the electric wire. After magnetization, the iron core becomes a magnet, so that the magnetic force of the wire is greatly enhanced due to the superimposition of the two magnetic fields. The iron core and the core of the electromagnetic iron are magnetized to become two pieces of magnets with opposite magnetic properties, and they generate electromagnetic attraction between them. The electromagnetic iron uses the electromagnetic force generated by the current-carrying iron core to manipulate mechanical devices to complete the expected actions.

Knowledge Expansion: The direction of the magnetic field of an electromagnet can be determined using Ampère's right-hand rule. Ampère's right-hand rule is a rule that indicates the relationship between the direction of the current and the direction of the magnetic flux lines generated by the current. It is also known as the right-hand spiral rule. 1. Ampère's right-hand rule for a straight electric conductors (Ampère's right-hand rule I): Use your right hand to hold the straight electric conductor, with your thumb pointing to the direction of the current, and your fingers pointing to the direction of the magnetic flux around the conductor. 2. Ampère's right-hand rule for a solenoid (Ampère's right-hand rule II): Use your right hand to hold the solenoid, with your fingers bent to match the direction of the current, and your thumb pointing to the N pole of the solenoid. Electromagnets have many advantages: The presence or absence of magnetism can be controlled by turning on or breaking the current; the strength of magnetism can be controlled by the strength of the current or the number of turns in the coil; the magnetic polarity can also be controlled by changing the resistance to control the size of the current; and the direction of the magnetic pole can be controlled by changing the direction of the current, and so on. That is to say: The strength of magnetism can be changed, the presence or absence of magnetism can be controlled, the direction of the magnetic pole can be changed, and magnetism can disappear when the current disappears.

Do you know the application of electromagnets in daily life?
1. Magnetic Levitation Train 2. Electric Bell 3. Generator 4. Electric Motor 5. Automatic Control Device

3. Electric Fan Course:
I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. Should I put down the heavy shell and find where the blue sky is? With the gentle wind gently floating, the injuries feel no pain. I want to climb step by step, waiting for the sun to look at its face quietly. The little sky has a big dream, the heavy shell wraps the gentle gaze. I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. Let the wind dry the tears and sweat that flowed, there is always my day. A nice snail song reminds us of the cute little snail. Next, let's make a snail fan and cool down in the hot summer.

Electric fans are an indispensable household appliance for us in summer to cool off and relieve heat. But do you know why opening a fan will bring a cool breeze that makes us feel cool? Do you know how fans rotate? I believe that after learning this experiment, you will understand the scientific principles behind it.

Experimental Focus:

Through DIY, I have a preliminary understanding of the working principle of a fan.



Experimental Purpose:

Understanding the Structure of a Simple Fan.

Experimental Cognition

The invention of the fan It is now difficult to find relevant information on who actually invented the fan. It is said that in 1882, the director technician of Crockard's Engine Works in New York, USA, Huie Scates Hoyera, was the first to invent a commercially available fan. The following year, the factory began mass production, with the initial fans being tabletop models with only two blades. In 1908, the American company, the Eck Engine and Electric Company, successfully developed the world's first electric fan with a wheel drive that can swing left and right. This type of fan prevented unnecessary 360-degree head movement, making it the mainstream for future sales.

Scientific Principles:

The main components of an electric fan are: an AC motor. Its working principle is: a wire coil in a magnetic field experiences force to rotate. The form of energy conversion is: electrical energy is mainly converted into mechanical energy, and since the coil has resistance, some electrical energy is inevitably converted into internal energy. Can an electric fan make the indoor temperature lower? The indoor temperature not only does not decrease, but it will increase. The reason for the temperature increase is: when an electric fan is working, due to the current passing through the coil of the electric fan, the wire has resistance, so it will inevitably generate heat, which will release heat, so the temperature will increase. But why do people feel cool? Because the body surface of the human body has a large amount of sweat, when the electric fan works, the air in the room will flow, so it can promote the rapid evaporation of sweat, combined with "evaporation needs to absorb a lot of heat", so people will feel cool.

Experimental steps:

1. Recognizing the Experiment Device
2. Use double-sided tape to fix the motor to the battery box.
3, install the fan blades on the motor, turn on the switch on the battery box, and the small fan will start spinning.

Hint:

The positive and negative leads of the battery box should not be in direct contact to prevent burning the hands of children.
You cannot use the electricity from household or school outlets directly for experiments, to prevent electric shocks and potential harm to people.

Science Expansion:

The possible reasons for a DIY electric fan not spinning.
1. Maintenance is poor, and there has been a long-term lack of lubricant. The fan shaft part needs to ensure that there is lubricant, otherwise the wind blade cannot be dragged by the motor above. If you are at home, you can choose to turn off the power, and then turn the wind blade, if it rotates stiffly, it is basically without lubricant.
2. Wear caused by long-term use. If an air conditioner is used for a long time, the motor will wear out, and the shaft sleeve of the motor will easily burn out after wear.
3. Overheating causes the fan to stop spinning. In the fan device, there is a motor, and there will be an overheating circuit breaker inside the motor. If there is a short circuit in the winding, it will cause the heat to increase within a short period of time, and under this condition, the motor will stop working.
4. The capacity of the starting capacitor decreases. As fans age, the capacitor's capacity decreases, leading to a reduction in the motor's starting torque, which is unable to drive the load.
5. Electrical faults, such as damaged wiring.

Scientific Inquiry: My assembled fan doesn't work (it's reversed), what should I do?

Courseware 2

I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. Should I put down the heavy shell and find where the blue sky is? With the gentle wind gently floating, the injuries feel no pain. I want to climb step by step, waiting for the sun to look at its face quietly. The little sky has a big dream, the heavy shell wraps the gentle gaze. I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. Let the wind dry the tears and sweat that flowed, there is always my day. A nice snail song reminds us of the cute little snail. Next, let's make a snail fan and cool down in the hot summer.

Experimental Objective: 1. To understand the basic knowledge of simple electrical appliance circuits.
2. Understand the structure of an electric fan.

Principle Application: Converting electrical energy into mechanical energy using an electric motor.

Small experiments, big science
1. Explore the Working Principle of an Electric Fan:
The main components of an electric fan are: the power supply, the motor, and the blades.
The working principle is: the circuit is connected, and the electrical energy provided by the battery is transferred to the motor, which then converts it into kinetic energy. Once the motor starts working, it drives the blades to rotate, accelerating the flow of air around it, thus creating a wind.

2. Understand fans and their working principles.
Electric fans, also known as fans or blowers, are household appliances that use electric motors to drive fan blades to rotate, thereby accelerating the flow of air. They are mainly used for cooling and circulating air, and are widely used in places such as homes, classrooms, offices, shops, hospitals, and hotels.

Knowledge Expansion
Understanding the Origin of Electric Fans:
The origin of the mechanical fan dates back to the attic, in 1829. Inspired by the structure of clocks, an American named James Byron invented a mechanical fan that could be fixed to the ceiling and driven by a spring. This fan, which rotated the blades to create a gentle breeze, was welcomed, but the process of climbing a ladder to wind it up was quite troublesome. It wasn't until 1880 that the American Schuyler directly mounted the blades on an electric motor, connecting it to an electrical source to make the blades spin rapidly, creating a strong breeze. This was the world's first electric fan.

Common types of electric fans in daily life:
Nowadays, electric fans are classified based on their structure and usage features: they can be divided into table fans, floor fans, wall fans, ceiling fans, ventilation fans, and swing fans. Based on the blades, they can be classified as fan blades or no-blade fans.

Zhejiang Jianyi Education Technology Co., Ltd.
Zhejiang Jianyi Education Technology Co., Ltd. (formerly Yifei Toy Factory)Established in 2007, the current brand is "XING TEACHER" and "JIAN YI". Over the past 10 years, our company has made unremitting efforts to make the enterprise gradually mature. Our company is a member of the Teaching Equipment Industry Association of the Ministry of Education, and is a leading enterprise in Zhejiang Province. The company has been awarded the "Heavy Contract and Credit-Keeping" unit for three consecutive years by Jinhua City. In 2014, it was awarded the "Advanced Collective of Jinhua Teaching Instrument Industry" by Zhejiang Province.
Zhejiang Jianyi Education Technology Co., Ltd. is a high-tech enterprise that integrates modern scientific research and development of educational equipment, curriculum design, teaching resource integration, and technical services. Zhejiang Jianyi Education Technology Co., Ltd., with high-tech products and modern educational equipment, has established itself in the education industry. Our products are sold all over the country and have been exported to Europe, America, Japan, and South Korea. After years of accumulation, the company has begun to take shape. In terms of technological innovation, the company has professional design personnel engaged in the research and development of complete sets of educational products and the upgrade of existing products; in production, management, and installation services, the company strictly implements the ISO9001 international quality assurance system standards; in marketing, the "Xing Teacher" products have been introduced into many provinces and cities in the country and enjoy a good reputation; for many years, it has provided high-quality, advanced, professional series of modern teaching equipment and professional equipment research and development custom services for the education industry. With excellent, high-quality professionals and perfect after-sales service quality, the company has established a good corporate image.Xing teacher's" series of science and education physics, chemistry, photovoltaic, wind energy, geography, biology, art, and so on, has successfully won bids in the education bureau tenders multiple times. Zhejiang Jianyi Education Technology Co., Ltd. continues to adhere to the business philosophy of "quality first, service to diligence, honesty in character," and upholds the "Xing teacher" culture, casts the "Xing teacher" brand, and creates the development policy of the "Xing teacher" career. We provide excellent equipment and high-quality services for school teaching and scientific research. We are willing to cooperate sincerely with new and old friends at home and abroad, work together, and devote our efforts to education and education.

  Before assembling, please check if the circuit is unblocked and all the components are complete. Ensure that all contact points are in good contact. During the assembly process, be careful not to get glue on your clothes or skin. Keep the parts out of reach of younger siblings to prevent them from swallowing them by mistake! Do not play with them on your head, to avoid the model falling and injuring you!