ruhmkorff coil การใช้

• A spark gap is placed in parallel to the Ruhmkorff coil before the capacitors.
• The Ruhmkorff coil, being fed from a main source, is wired to capacitors on both ends in series.
• He covered the Hittorf-Crookes tube with the cardboard and attached electrodes to a Ruhmkorff coil to generate an electrostatic charge.
• At Flat Holm Mr Preece s apparatus was arranged, the Ruhmkorff coil also giving sparks from an eight-cell battery ."
• In order to produce these discharges, a small Wimshurst influence machine was used, with or without a condenser, or a Ruhmkorff coil.
• In order to produce these discharges a small Wimshurst influence machine may be used, with or without a condenser, or a Ruhmkorff coil.
• In August 1898 he got, " Electric Telegraphy ", that made wireless signals using a Ruhmkorff coil for the transmitter and a Branly coherer for the detector.
• As he passed the Ruhmkorff coil charge through the tube, he determined that the cover was light-tight and turned to prepare the next step of the experiment.
• Transistorized devices are also silent, unlike true Ruhmkorff coils, which make its characteristic buzzing noises when in action, even if they are contained in closed casings or boxes.
• When a Geissler tube was brought near a source of high voltage alternating current such as a Tesla coil or Ruhmkorff coil, it would light up even without contact with the circuit.
• "' Heinrich Daniel Ruhmkorff ( R黨mkorff ) "'( January 15, 1803 in Hanover  December 19, 1877 in Paris ) was a German instrument maker who commercialised the induction coil ( often referred to as the Ruhmkorff coil .)
• In 1845 Joseph Henry, the American physicist, published an account of his valuable and interesting experiments with induced currents of a high order, showing that currents could be induced from the secondary of an induction coil to the primary of a second coil, thence to its secondary wire, and so on to the primary of a third coil, etc . Heinrich Daniel Ruhmkorff further developed the induction coil, the Ruhmkorff coil was patented in 1851, and he utilized long windings of copper wire to achieve a spark of approximately 2 inches ( 50 mm ) in length.
• Modern inverters for portable fluorescent lamps do not rely on electromechanical and electromagnetic vibrating switching contacts to produce the required current interruptions in the transformer s primary winding that are required in order to produce the induced high voltages in the transformer's secondary winding, as occurs in Ruhmkorff coils; instead, the primary circuit of the transformer is switched by means of one or two transistors oscillating at frequencies of tens or even hundreds of thousand cycles per second, which results in smaller and lighter devices having a very good efficiency in lumens / watt for a given battery consumption or a longer battery charge life for a given light flux when compared with incandescent lamps.