How can I make an electroscope?
408213
Ok. Try This.....\n\nStart with a clear glass or plastic jar, some stripped wire, a strip of aluminum foil, and a larger piece of aluminum foil. \n \nBend the wire over the top of the jar so that it goes over the middle and is wrapped around the opening of the jar. Now fold the aluminum foil strip over and drop it over the wire, so that it hangs down into the jar.  \n\nNext take the larger piece of aluminum foil: make it roughly circular by cutting or folding the corners underneath, and press it over the top of the jar. Next wrap electrical tape (or any tape) over the edges of the aluminum foil holding it to the jar. Finally smooth out any bumps in the foil. \n \nYour electroscope should look something like this. \n \nComb your hair a few times and hold the comb close to the top of the electroscope. The ends of the aluminum foil should push away from each other because of electric charge. \n \nYou can discharge the scope with your hand while holding the comb close to the top of the scope. \n \nMove your hand away. \n \nMove the comb away. \n \nA charge has been induced into the electroscope. When you were discharging the scope charge remained close to the comb and when you moved the comb away that charge was released to spread through the rest of the metal parts including the aluminum strip. \n\nHope this helps.
997515
vernier callipers \nmeasuring weights\nmagnet bars\nIC tester\nvoltmeter\nammmeter\nenergy meter\nMultimeter\nDC Power Supply \nFunction Generator \nDigital Multimeter \nOscilloscope \npower wires\nBreadboard\nresitors \ncapacitors\nvoltage divider and current divider circuits
25444
You could try to make an accurate experimental thermometer by glueing two strips of dissimilar metals together along their lengths. Perhaps try copper and steel or copper and aluminum or steel and aluminum.  Try perhaps one half inch wide by six inch long strips.  Use sheets of metal that are equally thin.  Perhaps cut the strips from aluminum soda cans and steel soup cans, etc.  Use a magnet to check for steel vs aluminum.  Glue the strips together using epoxy or super glue.  Attach one end of the combined strip to a firm base and leave one end free to move in front of a paper scale.  You now have a bimetalic thermometer.  The thermometer can be made to be more sensitive by using greater length strips and bending the strips into a spiral and attaching a pointer to the free end of the spiral to amplify movement.  This is how most oven thermometers are built except the metals are joined without glue.  The principal of operation of a bimetalic thermometer is that one  metal expands or contracts more or less than another metal.  When joined, a temperature change causes the combined strip to bend.  You can calibrate your thermometer by marking its "pointer" position at two or more large temperature changes then calculating the total deflection divided by the total temperature difference to get deflection per degree (either F or C).  Be careful with tin snips and epoxy or super glue.  Good luck.\n\nAs an alternative, you can make a highly accurate experimental thermometer by winding very thin insulated copper wire (like that used in toy motors) around a wooden spool and connecting the scraped   wire ends to an accurate ohmmeter to measure resistance change vs temperature change.  Calibrate as before but remember that calibration temperatures must be steady long enough for any lag to catch up.  This is called a resitance thermometer and accuracy will depend on the length and thinness of wire and sensitivity of your ohmmeter.  Also the ohmmeter should not cause enough current to flow in the wire to heat the wire.  Observe for drift (increase in resistance and temperature) while taking measurements.
438682
sure. go to a science store or look up schematics on the web.
746721
Anything where an electrical currant passes thru it,  also has an electromagnetic field, around it.\n Simple test- scatter iron fillings onto sheet of paper,place over circuit,motor,speaker etc, watch fillings change shape/format to that of electromagnetic field.
317868
well for my physics project for the boards i made a photoelectronic burglar alarm- at the heart of this was an LDR( Light Dependent Resistor) when the beam of light is obstructed (think laser in the movies-lol) the LDR resistance rises and the circuit inside is set into oscillation and the alarm sounds- other good projects would be a rain alarm, a rectifier, an electroscope,..... the possiblities are endless- i suppose you could do anything involving electric circuits since thats what the cbse calss 12 physics text covers most- i doubt ud want to do anything on ray or wave optics
920243
Make a Simple Telescope\nYou will need the following: \ntwo magnifying glasses - perhaps 1 - 1.5 inches (2.5-3 cm) diameter (it works best if one is larger than the other) \na cardboard tube - paper towel roll or gift-wrapping paper roll (it helps if it is long) \nduct tape \nscissors \na ruler, yard stick, or tape measure \nsheet of printed paper - newspaper or magazine will do \nTo assemble your telescope, do the following: \nGet the two magnifying glasses and a sheet of printed paper. \nHold one magnifying glass (the bigger one) between you and the paper. The image of the print will look blurry. \nPlace the second magnifying glass between your eye and the first magnifying glass. \nMove the second glass forward or backward until the print comes into sharp focus. You will notice that the print appears larger and upside down. \nHave a friend measure the distance between the two magnifying glasses and write the distance down. \nCut a slot in the cardboard tube near the front opening about an inch (2.5 cm) away. Do not cut all the way through the tube. The slot should be able to hold the large magnifying glass. \nCut a second slot in the tube the same distance from the first slot as your friend wrote down. This is where the second magnifying glass will go. \nPlace the two magnifying glasses in their slots (big one at front, little one at back) and tape them in with the duct tape \nLeave about 0.5 - 1 inch (1 - 2 cm) of tube behind the small magnifying glass and cut off any excess tube remaining. \nCheck to see that it works by looking at the printed page. You may have to play slightly to get the exact distances between the two glasses right so that the image comes to a focus. \nWith your telescope, you should be able to see the moon and some star clusters as well as birds, etc. \n\n+++++++++++++++++++++++\n\nMake a Simple Microscope\nYou can make a simple microscope by using magnifying glasses and paper: \nGet two magnifying glasses and a sheet of printed paper. \nHold one magnifying glass a short distance above the paper. The image of the print will look a little bit larger. \nPlace the second magnifying glass between your eye and the first magnifying glass. \nMove the second glass up or down until the print comes into sharp focus. You will notice that the print appears larger than it does in the first magnifying glass. \n\nI've included two links below for this and other info.\n\nMyst
748213
Try Edmund Scientific on the web..but if you want to make your own try the link provided.\n\nGood luck!
465788
Are you asking how a laser is made, or what sort of things can be made to lase?
73023
A classic, but great visual experiment is sucking a hard boiled egg into an erlenmyer flask.  It is done by using the principles of the kinetic theory of matter.  \nAnother cool project might be doing something with dry ice.  Find a place that you can get dry ice and do fun stuff with it, like create smoke, put bubble solution in water and then drop in dry ice to make bubbles that, when you pop, let out white smoke.\n\nAnother idea might be to do some cool colorful reactions.  Make some dye molecules or something.\n\nHope one of these ideas works for you.
431240
oh this has been awhile....ok a block of wood, a couple nails, some tape, some wire, and a six? volt battery.\n\nyou are basicaly making one of the nails an electro magnet so that when the circuit is completed it comes on and pulls down one of the wires to the top of it making a clicking noise, open the circuit the wire will spring back up.  \n\nhere is a more complicated one that will send to another one\nhttp://www.apluschilddev.com/headstart/services/projects/easy_make_telegraph.htm
203892
Distill the water. The WATER comes out of the tubes, not the salt.\n    As for testing, just drink a little of it. Do you *LIKE* it?\nNo? Well you better make sure that you don't put it back in the same cup you used for collection.\nOK the water will still pass an electric current through it if it has any impurities. Completely pure water will not.\nUnless you use more than around one volt, in which case the bubbles you see escaping will be hydrogen and oxygen. That means you've gone too far with the testing part.
1122421
there is no scope for electronics its the category which is not consider as a very good category.try some engineering or something
727564
a pin-hole camera (see en.wikipedia.org/wiki/Pinhole_camera)\nor kaleidoscope (see en.wikipedia.org/wiki/Kaleidoscope)\nmay be interesting projects.
486492
THE EASIEST WAY TO DEMONSTRATE GENERATION OF ELECTRICITY IS TO GET SOME SMALL INSULATED COPPER WIRE AND WRAP IT AROUND A SMALL PILL BOTTLE,  AT LEAST 100 TURNS OR MORE (MORE IS BETTER) CLEAN THE INSULATION OFF THE ENDS OF THE WORE AND ATTATCH TO A VOLTMETER OR A MILLIAMETER.. INSERT A BAR MAGNET INTO THE PILL BOTTLE QUICKLY.  THE METER WILL GO ONE WAY WHEN YOU INSERT THE MAGNET AND WILL GO THE OTHER WAY WHEN YOU PULL THE MAGNET OUT.  THE FASTER YOU MOVE THE MAGNET THE MORE THE METER MOVEMENT.  HOPE THIS HELPS
666368
Yes, the electroscope was one of the first instruments to indicate electric charge. It is still used for science demonstrations The electroscope is an instrument that consist of a glass container with a metal disk or ball on the top. Two thin leaves of matal foil are suspended from a hook attached to the disk (electrode). When the electrode is electrically charged by induction or by contact, the leaves get similar electric charges and repel each other due to the Coulomb force. Their separation is a direct indication of the net charge stored on them.
562525
a school science project?\nhow about a demonstration of how light flows through fiber optic cable, how you can change the color with a color wheel, change the look with different diameter fiber cable and lengths. you could make a really cool display that looks like a galaxy or some celestial picture...only thing is it has to be viewed in complete darkness, so you may have to build it in a box- or just turn out the lights. you could relate how it has effected the telecommunications world, etc...\nonly thing is may be hard to find cable at a cheap price with out buying bulk- but if you are resourceful you may do it, or you could buy cheap pens, or a hobby store may carry it. then as a light source use an LED and make a color wheel with clear plastic sheeting and colored sharpie pens, and battery energy source.\n\nhttp://www.cablecominc.com/fiber.jpg\nhttp://www.network-cables-guide.co.uk/images/fibre-optic.jpg\nhttp://www.arcelect.com/fibercable.htm\nhttp://electronics.howstuffworks.com/fiber-optic.htm\nhttp://www.delmartrading.com/images/products/FiberOpticPen.jpg\n\ngood luck, have fun