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This experiment demonstrates the force on a closed conductor in which current is being induced. Using DC in the primary coil, there is a pulse as the power is turned on and the coil is forced away. Using AC, the coil hovers over the primary coil.
When electrical energy is transmitted over long distances, it is unavoidable that there will be losses due to resistance in the lines. Using transformer stations and high-voltage transmission lines can drastically reduce such losses. To model such lines, two wires of 1 m in length and ...
Oscillations occur in physics in an extremely wide range of
occurrences.They are macroscopically visible in the swinging and
cushioning of cars or suspension bridges. In Nature, however, there
is as a rule never a single oscillation but always only coupled
ones. Only so can waves ...
Resonance fluorescence is demonstrated by illuminating a
sodium vapour with white visible light. The emitted light is
spectrally analyzed and shows the emission spectrum of sodium.
Therefore the same atomic levels are involved in both
absorption and emission.
If a circular disc separated into various differently coloured sectors is rotated by a motor so fast that the eye can no longer distinguish the colours, a mixed colour is then perceived. By varying the composition and size of the sectors, it is possible to give the impression of any ...
A collector test field can be used to investigate the
temperature response of four differently designed solar
collectors. It also demonstrates the effect of the
absorber's colour, of heat insulation and covering of the glass.
Measurements are made simultaneously and ...
The students should measure length, diameter, and hole depth of
various objects with a measuring tape and/or vernier caliper as
possible. In doing this they should choose and use the more
suitable measuring device. The results should be entered in the
table as a numerical value ...
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