purpose and function of electric screwdriver?
962936
Time and energy saving device designed to prevent a person from developing forearms that resemble "Popeye The Sailor"!!!!!
194095
One it protects the ends of your fingers and it aids in picking up very thin things. Cut yours really short and try to pick up a needle.
992162
In the planning phase of each mission, tools are selected on the basis of the jobs that must be done. Specialized tools are often created when no existing tool will do the job. Many of the tools found in a traditional tool box on Earth are used in space as well. The tools are modified to make them easier and safer to use in space. For example, the handles of tools are often enlarged so they will take less energy to hold. A spacesuit glove is similar to a thick leather welder’s glove in bulk. Because the suit glove is pressurized, the astronaut's fingers extend out when at rest. Closing the fingers around a tool handle takes a continuous application of force. Quite simply, small-handled tools take more force to hold than do large-handled tools.\n\nTo keep control of tools, each tool has some sort of tether or locking system. A socket wrench has a key that has to be inserted into a holder before a socket can be installed at the end of the wrench. Once the key is removed, the socket is then locked onto the wrench and cannot be removed without use of the key again. A short tether and clip enables the astronaut to hang on to the wrench in case it is dropped. There is even a tether on the key. Rechargeable power tools for driving bolts are also used by spacewalkers.
677739
Hammer & screwdriver.
679356
It is designed as a deep penetrating mild steel electrode that can weld in all positions with AC or DC. Because of its ability to cut and fill it is also used as a utility electrode and can weld through rust, paint etc.
1026557
Here is a comprehensive list of surgical instruments and their functions.  Good luck!\n\nhttp://www.gtamart.com/mart/products/surginst/
986400
Well, as the site below says :\n"MagDrive is not "FREE ENERGY" its the process of converting magnetic field energy into mechanical motion and converting that rotational mechanical motion into electrical energy. Its not about getting more out of less, that violates basic laws of physics, its about continuous steady operational service" \n\nand\n\n "The MAGDrive Motor© will be an essential replacement for the internal combustion engine application in the Hybrid vehicle market and eliminate the need for remote charging stations in the future EV automotive arena. \nThe MAGDrive Motor© is constructed and designed with only [1] one moving part which requires minimal service or maintenance for the life of the motor.\nVarious motor size applications can be applied for increased power output production through the use of additional rotor shaft assemblies for, [ie: automotive, home and recreational uses].\nCurrently The MAGDrive Motor© is not a direct motor to load device. It's primary use is to provide rotational energy to a power generating device such as an alternator or generator through a series of geared or pulley ratios, therefore transferring the developed energy from the high speed rotational motion produced by the motor.The MAGDrive Motor© is not built of steel or exotic alloy materials. Generally speaking, it's constructed of ALUMINUM,HDPE & CERAMIC materials exclusively."\n\nI thik that is some kind of new power generator which converts the Earth's magnetic field lines into electricity.  I belive that's pretty all I could find, that's also because as the guys who made the site said:\n"Currently only 1 functional development prototype unit exists, although very primitive in design and functionality it has been disassembled and is stored in a secured environment."\n\nSelf-explaining the action taken by :\n\n"Our reason for this decision is to avoid any nay-sayers or skeptics who would make adverse statements prior to the release of our production units."\n \nDfriend :)
809231
Ok then, one at a time\n\nwhy are the wires in a plug covered in flexible plastic? - its insulation to stop the individual strands of wire touching each other and causing a short circuit.\n\nwhy is brass used to make the pins in the plug? - 2 reasons, its a very good conductor of electricity and its very strong and resilient to being put in and taken out of the spring loaded metal strips that contact it in a plug.\n\nwhy is the earth pin longer than the others? - its a safety thing, the earth pin goes in first and you cant insert anything into the other two holes until it has - its to stop kids frying themselves if they shove stuff into the holes.\n\nwhy is thick cable used for some appliances and thin for others? - depends upon the amount of current it'll be carrying, a cable for an adaptor for a USB external drive say is thin because it uses a small amount of current, but your electric cooker uses tons, the wire has to be thicker to carry the amount of amperage travelling through it so that it doesn't overheat.\n\nwhat is the purpose of a fuse? - its in case of a power surge, it will blow if too much current passes through it, the fuse blows and not your expensive electrical items.\n\nHope that gave you all you needed to know.
300542
"An assembly consisting of a magnet mounted on a frame, and a wire coil (armature) that can be rotated within the magnetic field. The function of the generator is to convert mechanical energy into electrical energy."\n\nBasically in a generator you can induce current by rotating a magnet inside a wire coil.  The opposite of this is a motor in which the electricity causes mechanical movement.
167146
turns light into energy.\n\ncharge a battery for free
699987
Plastic safety  plugs, to stop fingers going in  electric sockets.\n Safety gates (mothercare) to stop going on stairs or into kitchen/hall.\n Reins to let them walk safely. Baby seat for car.\n\n  M  :  )\n\nHope this is what you meant.
658052
It's an amplifier used to drive piezo electric devices that usually require large voltages (50-200V). e.g. a servo amplifier will be needed if you want to control a piezo device using a computer with a +/-5V card.
699448
There are mechanical ones, and electronic ones.\n1) Mechanical: A clutch, usually made of 2 magnets. One magnet rotates, the other one is fixed to a spring-loaded needle. The faster the first magnet rotates, the further the needle goes clockwise.\n2) Electronic: \na) Optical: The drive shaft has a marker in a colour distinctively different from the shaft's colour. A photo reflector (photo diode and photo transistor combination) reads the changes in colour (brightness), and produces pulses which can be electronically counted during fixed time periods.\nb) Hall Effect: Instead of colour markers and photo detection, a hall sensor is used at an irregular (metal) shape of the drive shaft. The rest is the same.
937573
Capacitors serve a couple of purposes beyond what you mention.  They allow the ac component of a dc signal to pass, such as in a power supply, thereby smoothing the dc output.  These are polarity-sensitive caps called electrolytics.  The smaller, non-polarized caps are used as coupling devices for RF devices.  There are, in fact, several uses for the device, and building functioning circuits without them would be almost impossible.
721433
Edit: Perhaps I should revamp my answer to provide a clearer (actual) answer, that explains exactly what plays a role and, in effect, why I am right. I also added a couple sources you should read (in case you don't believe me ;-).\n\nAs asked at the first source (which has very good information about electric motors), "How can I make the motor spin faster or slower?". The answer is that it has to do with the power of the magnetic field. Because electicity is magnetic, you can either effect the speed by using a more powerful magnet or a more powerfully magnetic electrical current.\n\nTo quote Wikipedia about what a volt is, "The volt is the SI derived unit of electric potential difference". To truly understand what the "electric potential difference" means, you must first better understand the volt. The volt is a measurement of electromotive force (emf) and is just defined in terms of amperes and watts.\n\nAn amp is the constant current which produces a force equal to 2x10^-7N per meter, when travelling across two parellel wires one meter apart. It is one coulomb of charge per second (Q/t). It is a base unit upon which other units of electicity are defined (such as the volt).\nA watt is the unit of power equal to one joule of energy per second (P=W/t).\n\nHmm. Power? Power of a magnetic field? So how can you get more power in your circuit? If your power source is not rated by power output, then you can figure out the power using convertion:\nA=W/V=C/s\n\nIf you want a higher wattage, you can increase the voltage (electrical potential) or the ampage (current) or both. Or you can increase the charge - the amount of electricity (coulombs).\n\nSo the fact remains that voltage is *not* directly related to the speed of a motor. It can be directly converted in a way that makes it useful for that purpose, but any number of other things can be done to increase the power - the real goal you are looking for.\n\nThe answer is a definite "No." and a half-assed "Yes.".\n\n\n---Original Answer---\nNo. You might want to read more about the electric motor ( http://en.wikipedia.org/wiki/Electric_motor ) and magnetic properties of electricity ( http://en.wikipedia.org/wiki/Electromagnetism ). Also see the definitions of volt ( http://en.wikipedia.org/wiki/Volt ), watt ( http://en.wikipedia.org/wiki/Watt ), and amp ( http://en.wikipedia.org/wiki/Ampere ).
269660
Basic electricmagnet....wrap thin insulated wire around a nail....connect the ends of a wire to a battery.  Increase the size of the nail....increase the number of wraps of thin insulated wire.....and lastly increase the amount of battery and you will increase the strength of the magnet.
942750
its a measuring instrument to measure the outer dimensions (inner also)of objects,usually at an accuracy of 0.01mm ,also called micrometer.\nthe main part of instrument is a screw and the pitch of the screw will be .5 mm for a .01mm least count screw gauge. and one rotation of the screw is marked  into 50 divisions.\none drawback of screw gauge is the zero error.\ndue to backlation but which can be easily corrected. there are digital micrometers also in the industry now