Energy Transfer | Energy | PHYSICS A. Thermal Generator
The Thermal Generator comprises a Peltier/ Seebeck element mounted on a large heat sink. The Thermal Generator can be used in two ways:
When used as a Seebeck element the device can produce a voltage if one face is warmed and the other cooled.
When used as a Peltier element a temperature gradient is produced across the element if a voltage is applied to it. The unit has been designed such that when a positive voltage is applied to the red terminal the top surface of the element becomes cool and the bottom surface hot. The heat sink removes this heat.
By sitting a beaker of boiling water on top of the element a voltage is produced which is large enough to operate the Solar Motor.
The specification of the Peltier/Seebeck Element is:
• Size: 30 x 30 x 4.7mm • Maximum cooling performance: 17W
• Maximum temperature difference between faces: 67°C
• Maximum voltage: 8V d.c. • Maximum current: 3.5A • Maximum working temperature: 70 - 80°C • Internal resistance: 1R8 E8R07116
B. Mounted Lamp 12V 24W
For use with the mounted solar cell and a solar motor. A 12V 24W S.B.C. bulb in a metal socket mounted on a folded metal base 100 x 63mm with a pair of 4mm sockets. The power rating of the bulb has been chosen so that when it is placed in front of the solar cell sufficient power is produced to run a solar motor effectively whilst avoiding the risk of damage to the cell by excess light and/or heat.
E8H76804 C. Mounted Solar Cell
To demonstrate the production of electrical energy directly from light energy. The apparatus comprises a selenium photo-voltaic cell housed in a plastic case with a diffusing lens front 25 x 25mm. Dimensions: 100 x 45 x 65mm.
E8H25705 each £14.95 D. Faraday Perpetual Flashlight
A torch that uses the principle of Faraday’s Law of Induction that never needs batteries. Shaking the torch passes a magnet through a copper coil which creates an electric current. This current is then stored in a capacitor which powers an ultra bright LED that can be seen for up to a mile. After an initial 3 minutes shake to get it going, the torch then only requires 45 seconds of shaking to provide enough electrical energy to power the LED light for up to 5 minutes.
E8L03128 E. Hand Generator Set
Involve students in investigations by using their own energy to generate d.c. electricity. If the handle is turned slowly, the bulbs of, for example, the Triple Lamp Unit, will light dimly; if turned faster, the bulbs become brighter. A high quality motor unit driven from the hand crank via 2 stage step up gearing. Capable of generating approximately 6V d.c., with the polarity determined by the direction in which the handle is turned. Supplied with 1m of detachable twin lead terminating in a pair of crocodile clips. Dimensions: 140 x 114 x 39mm. Mass: 115g.
Direct Delivery – up to 7 days E8A42948
each £56.95 each £11.95 E each £10.95 C each £26.95 D A B