Iron-Nail Bridge

Mobile Science Museum · Electromagnetism

Operation: 1. Press the "Power On" button, and the timer starts counting; 2. Within the specified time, use small iron nails to connect the left and right "bridge piers" to build the "bridge deck"; 3. Press the "Power Off" button and observe the phenomenon. Function Overview: The exhibit consists of two bridge piers made of electromagnets and several iron nails. When the visitor presses the power-on button, the digital display starts a countdown. The visitor must complete the bridge deck connection with iron nails within the set time. When time is up, the electromagnets automatically power off, or the power can be directly turned off by pressing the power-off button. Scientific Principle: Why can small iron nails attract each other to form a "bridge deck"? The "bridge piers" on both sides are iron cores with coils wound around them, i.e., electromagnets. When power is off, the "bridge piers" have no magnetism, but when the coil is energized, the iron core in the middle becomes magnetic. At this time, when small iron nails approach the "bridge pier", they are attracted to it and also become magnetic. Because magnets have the characteristics of like poles repelling and opposite poles attracting, the iron nails can connect end to end between the two "bridge piers" to form a "bridge deck". The phenomenon in which these originally non-magnetic iron cores and iron nails exhibit magnetism under the action of a magnetic field is called magnetization. Electromagnetic chucks, solenoid valves, etc., all utilize magnetization. You can also try using a small magnet to magnetize a sewing needle to make a simple compass.

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• China Science and Technology Museum Standard Edition CSTM Standard Edition
  Dimensions (unit: m): 0.75×0.68×1.12 Brand: KexMall Model: PopsciCat-Mobile-046 1. Materials: ① Base: flame-retardant ABS injection molding, thickness ≧4mm ② Tabletop: compact laminate, thickness ≧12mm ③ Instruction sign: acrylic UV printing ④ Tabletop fasteners: standard triangular locks ⑤ Protective cover: colored acrylic 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with KexMall® K1 type PLC controller with protection specially for science exhibits ② Switching power supply: AC-DCS-60-12/24 input AC100-240V, 50/60Hz, output power 60W ③ Button: self-resetting 22mm stainless steel metal button with ring light ④ Electromagnetic coil: custom-made ⑤ Digital display: custom-made 3. Energy Requirements: AC100-240V, 50/60Hz 2000W

  Operation: 1. Press the "Power On" button, and the timer starts counting; 2. Within the specified time, use small iron nails to connect the left and right "bridge piers" to build the "bridge deck"; 3. Press the "Power Off" button and observe the phenomenon. Function Overview: The exhibit consists of two bridge piers made of electromagnets and several iron nails. When the visitor presses the power-on button, the digital display starts a countdown. The visitor must complete the bridge deck connection with iron nails within the set time. When time is up, the electromagnets automatically power off, or the power can be directly turned off by pressing the power-off button. Scientific Principle: Why can small iron nails attract each other to form a "bridge deck"? The "bridge piers" on both sides are iron cores with coils wound around them, i.e., electromagnets. When power is off, the "bridge piers" have no magnetism, but when the coil is energized, the iron core in the middle becomes magnetic. At this time, when small iron nails approach the "bridge pier", they are attracted to it and also become magnetic. Because magnets have the characteristics of like poles repelling and opposite poles attracting, the iron nails can connect end to end between the two "bridge piers" to form a "bridge deck". The phenomenon in which these originally non-magnetic iron cores and iron nails exhibit magnetism under the action of a magnetic field is called magnetization. Electromagnetic chucks, solenoid valves, etc., all utilize magnetization. You can also try using a small magnet to magnetize a sewing needle to make a simple compass.

• Optimized Popular Edition Optimized Edition
  Dimensions (unit: m): 0.75×0.68×1.12 Brand: KexMall Model: PopsciCat-Mobile-046 1. Materials: ① Base: flame-retardant ABS injection molding, thickness ≧4mm ② Tabletop: compact laminate, thickness ≧12mm ③ Instruction sign: acrylic UV printing ④ Tabletop fasteners: standard triangular locks ⑤ Protective cover: colored acrylic 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with KexMall® K1 type PLC controller with protection specially for science exhibits ② Switching power supply: AC-DCS-60-12/24 input AC100-240V, 50/60Hz, output power 60W ③ Button: self-resetting 22mm stainless steel metal button with ring light ④ Electromagnetic coil: custom-made ⑤ Digital display: custom-made 3. Energy Requirements: AC100-240V, 50/60Hz 2000W

  Operation: 1. Press the "Power On" button, and the timer starts counting; 2. Within the specified time, use small iron nails to connect the left and right "bridge piers" to build the "bridge deck"; 3. Press the "Power Off" button and observe the phenomenon. Function Overview: The exhibit consists of two bridge piers made of electromagnets and several iron nails. When the visitor presses the power-on button, the digital display starts a countdown. The visitor must complete the bridge deck connection with iron nails within the set time. When time is up, the electromagnets automatically power off, or the power can be directly turned off by pressing the power-off button. Scientific Principle: Why can small iron nails attract each other to form a "bridge deck"? The "bridge piers" on both sides are iron cores with coils wound around them, i.e., electromagnets. When power is off, the "bridge piers" have no magnetism, but when the coil is energized, the iron core in the middle becomes magnetic. At this time, when small iron nails approach the "bridge pier", they are attracted to it and also become magnetic. Because magnets have the characteristics of like poles repelling and opposite poles attracting, the iron nails can connect end to end between the two "bridge piers" to form a "bridge deck". The phenomenon in which these originally non-magnetic iron cores and iron nails exhibit magnetism under the action of a magnetic field is called magnetization. Electromagnetic chucks, solenoid valves, etc., all utilize magnetization. You can also try using a small magnet to magnetize a sewing needle to make a simple compass.

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