Électrique/ Électronique

High-current transformer

1. Bring a nail to glow and furthermore to melt by the secondary current.
2. Bring a piece of Wood's metal to melt.

Effets de l'influence électrostatique sur l'électroscope

Principle

The students apply their knowledge of electrostatic induction to the electroscope. They recognize why a pointer deflection can appear even as a charged object approaches the electroscope. They can explain the series of events in the electroscope.

Benefits

• Quick and easy ...

Lb 4.2

An impulse acting on an object is defined as the change in momentum caused by a force Fover a short period of time t. The momentum p is defined as the product of force and time. It is conserved, provided that there is no friction and that the collision is elastic. This ...

Atténuation d'un pendule par courants de Foucault (Pendule de Waltenhofen)

Principe de l'expérience

Quand un corps conducteur massif se déplace à travers un champ magnétique, des courants de Foucault sont induits. Selon la loi de Lenz (règle de la main droite), le corps est ensuite soumis à une force qui s'oppose à ...

Rotary motion by turbulent flow - principle of the alternating current meter

Principle

A metal disc rotates on a bearing-mounted shaft in the presence to two out-of-phase alternating magnetic fields. Eddy currents are induced in the disc and forces are imparted onto this current-carrying conductor. Out-of-phase alternating fields also cause the rotational movement ...

Ohm's law

Principle

The connection between electrical voltage and the resulting current is measured with various test resistors.The quotient of voltage and current is a constant value that characterises the component.

Benefits

• Flexible experimenting thanks to wireless data transmission
• No ...

Production de tension alternative, rectification et lissage

Principle

An alternating voltage is induced in a coil in the (alternating) field of a periodically moving magnet. The characteristic of a diode to allow electric current only to pass in one direction is used to rectify the induced alternating voltage. A capacitor that is connected in parallel ...

Production de tension alternative, rectification et lissage

Commuutateur bimétallique

Principle

A bi-metal strip comprises two metal strips which are laminated together and have different thermal expansion coefficients. When warmed the strip flexes toward the side with the lower expansion coefficient. In so doing, it can act as a switch in the electric circuit.

Conversion de l'énergie électrique en énergie mécanique

Principle

A motor that raises a load, i.e. converts electrical energy into mechanical energy, is a familiar everyday sight. The special feature of this set-up is that it can be used to generate electrical energy again directly from the descending weight. That electrical energy illuminates a ...

Eep 10.1

Principle

A coil is located in a DC circuit. When the circuit is closed, the magnetic field of the coil builds up and generates a self-induction voltage which counteracts the increase.  An incandescent lamp in the circuit lights up only gradually.

La cellule solaire

Résistance of wires -dependence on length and cross sectio- nal area

Principle

The resistance of a short thick wire is different to that of a long thin one.

Benefits

• Flexible experimenting thanks to wireless data transmission
• No additional cable connections between the building blocks needed - clear arranged and quick setup
• Contact safety due to ...

Résistance of wires -dependence on length and cross sectio- nal area

Resistance of wires with SMARTsensece on the length and cross- section with measureAPP