Magnetism vs. Gravity
★Exhibit Content: Electromagnetic Induction, Eddy Current Damping ★Interaction: Mechanical Interaction ★Operation: Visitors manually release a metal ball through a funnel and compare its falling speed in an aluminum alloy tube, a copper tube, a polyethylene tube, and a high-strength brass tube, intuitively experiencing the effect of electromagnetic damping on motion. ★Exhibit Description: The exhibit mainly consists of tubes made of different materials such as plastic, bronze, and aluminum, allowing visitors to experience the falling speed of a ball in tubes of different materials. "Magnetic Force vs. Gravity" is an interactive science exhibit that intuitively demonstrates electromagnetic induction and eddy current damping. Through four tubes of different materials (aluminum alloy, copper, polyethylene, high-strength brass) and a 304 stainless steel ball, visitors can personally compare the falling speed of the ball in different tubes. When the ball falls in a metal tube, eddy currents are generated due to electromagnetic induction, creating an upward resistance that "fights" gravity, significantly slowing the fall; in a non-metal tube, it falls freely. This counterintuitive phenomenon vividly reveals the physical essence of electromagnetic damping. ★Scientific Principle: When a metal ball (which can be regarded as a strong magnet) falls in a metal tube, the magnetic flux through the tube wall changes over time, inducing an induced current (eddy current) in the tube wall; according to Lenz's law, the magnetic field generated by the eddy current opposes the change in the original magnetic field, exerting an upward electromagnetic damping force on the falling metal ball; and the higher the conductivity of the metal, the stronger the eddy current, the greater the damping force, and the slower the ball falls. The high conductivity of copper makes its damping effect the most significant.
Options
- 1.2×0.8×1.5m · Style 1 1.2×0.8×1.5mDimensions (unit: m): 1.2×0.8×1.5m Brand: KexMall Model: PopsciCat-ElectroMagnetic-143 1. Materials ①Base: Q235-2mm sheet metal baked paint cabinet + 12mm Kelesi artificial stone countertop ②Protective device: acrylic cover ③Magnet: NdFeB ④Aluminum tube: aluminum alloy ⑤Copper tube: copper ⑥Plastic tube: polyethylene ⑦Brass tube: high-strength brass ⑧Funnel: acrylic ⑨Metal ball: 304 stainless steel ⑩Instruction plate, graphic panel: 5mm acrylic UV printing 2. Main Configuration ①Demonstration device: 1 each of aluminum alloy tube, copper tube, polyethylene tube, high-strength brass tube + 304 stainless steel metal ball + acrylic funnel ②Drive mechanism: manual release mechanism (funnel + limit device, used to control the falling of the metal ball) ③Protective structure: acrylic cover, ensuring operational safety and preventing the ball from falling out 3. Installation Requirements ①Energy requirement: none ②Installation method: direct placement ③Entry passage: door frame size (width×height) ≥1.5m×1.8m, continuous turning interval in passage ≥2m ④Maintenance access: not required
★Exhibit Content: Electromagnetic Induction, Eddy Current Damping ★Interaction: Mechanical Interaction ★Operation: Visitors manually release a metal ball through a funnel and compare its falling speed in an aluminum alloy tube, a copper tube, a polyethylene tube, and a high-strength brass tube, intuitively experiencing the effect of electromagnetic damping on motion. ★Exhibit Description: The exhibit mainly consists of tubes made of different materials such as plastic, bronze, and aluminum, allowing visitors to experience the falling speed of a ball in tubes of different materials. "Magnetic Force vs. Gravity" is an interactive science exhibit that intuitively demonstrates electromagnetic induction and eddy current damping. Through four tubes of different materials (aluminum alloy, copper, polyethylene, high-strength brass) and a 304 stainless steel ball, visitors can personally compare the falling speed of the ball in different tubes. When the ball falls in a metal tube, eddy currents are generated due to electromagnetic induction, creating an upward resistance that "fights" gravity, significantly slowing the fall; in a non-metal tube, it falls freely. This counterintuitive phenomenon vividly reveals the physical essence of electromagnetic damping. ★Scientific Principle: When a metal ball (which can be regarded as a strong magnet) falls in a metal tube, the magnetic flux through the tube wall changes over time, inducing an induced current (eddy current) in the tube wall; according to Lenz's law, the magnetic field generated by the eddy current opposes the change in the original magnetic field, exerting an upward electromagnetic damping force on the falling metal ball; and the higher the conductivity of the metal, the stronger the eddy current, the greater the damping force, and the slower the ball falls. The high conductivity of copper makes its damping effect the most significant.
- 1.2×0.8×1.5m · Style 2 1.2×0.8×1.5mDimensions (unit: m): 1.2×0.8×1.5m Brand: KexMall Model: PopsciCat-ElectroMagnetic-144 1. Materials ①Base: Q235-2mm sheet metal baked paint cabinet + 12mm Kelesi artificial stone countertop ②Protective device: acrylic cover ③Magnet: NdFeB ④Aluminum tube: aluminum alloy ⑤Copper tube: copper ⑥Plastic tube: polyethylene ⑦Brass tube: high-strength brass ⑧Funnel: acrylic ⑨Metal ball: 304 stainless steel ⑩Instruction plate, graphic panel: 5mm acrylic UV printing 2. Main Configuration ①Demonstration device: 1 each of aluminum alloy tube, copper tube, polyethylene tube, high-strength brass tube + 304 stainless steel metal ball + acrylic funnel ②Drive mechanism: manual release mechanism (funnel + limit device, used to control the falling of the metal ball) ③Protective structure: acrylic cover, ensuring operational safety and preventing the ball from falling out 3. Installation Requirements ①Energy requirement: none ②Installation method: direct placement ③Entry passage: door frame size (width×height) ≥1.5m×1.8m, continuous turning interval in passage ≥2m ④Maintenance access: not required
★Exhibit Content: Electromagnetic Induction, Eddy Current Damping ★Interaction: Mechanical Interaction ★Operation: Visitors manually release a metal ball through a funnel and compare its falling speed in an aluminum alloy tube, a copper tube, a polyethylene tube, and a high-strength brass tube, intuitively experiencing the effect of electromagnetic damping on motion. ★Exhibit Description: The exhibit mainly consists of tubes made of different materials such as plastic, bronze, and aluminum, allowing visitors to experience the falling speed of a ball in tubes of different materials. "Magnetic Force vs. Gravity" is an interactive science exhibit that intuitively demonstrates electromagnetic induction and eddy current damping. Through four tubes of different materials (aluminum alloy, copper, polyethylene, high-strength brass) and a 304 stainless steel ball, visitors can personally compare the falling speed of the ball in different tubes. When the ball falls in a metal tube, eddy currents are generated due to electromagnetic induction, creating an upward resistance that "fights" gravity, significantly slowing the fall; in a non-metal tube, it falls freely. This counterintuitive phenomenon vividly reveals the physical essence of electromagnetic damping. ★Scientific Principle: When a metal ball (which can be regarded as a strong magnet) falls in a metal tube, the magnetic flux through the tube wall changes over time, inducing an induced current (eddy current) in the tube wall; according to Lenz's law, the magnetic field generated by the eddy current opposes the change in the original magnetic field, exerting an upward electromagnetic damping force on the falling metal ball; and the higher the conductivity of the metal, the stronger the eddy current, the greater the damping force, and the slower the ball falls. The high conductivity of copper makes its damping effect the most significant.
Review
Principle Display: ★★★ Interaction Effect: ★★★★ Ease of Installation: ★★★★★ Durability: ★★★★ Overall Rating: ★★★