Science Fair: Build a telegraph and an electric bell | ENEM 360 º
Presentation Someone, no doubt, soon saw the advantage of the electromagnet (experiment 02_096) on the permanent magnets, and one of the first devices that used it was the telegraph. The inventor of the telegraph was Samuel FB Morse.
Pressing the switch G (made of a strip of tin folded) abuts the blade on the nail F closing the electric circuit constituted by batteries (A), enamelled copper wire (B), electromagnet (C) and switch (G + F) . By doing this, the nail electromagnet (C) magnetizes and attracts up the blade (D), she hits the electromagnet and makes a noise, a "click". When you release the switch telex address opens the circuit, the nail loses its magnetism and releases the blade (D). A "click" quick identifies a dot (.), A "click" in more prolonged identifies a dash (-). Pressing and releasing quickly and timely switch (which changes its name to telegraph up handler) can ship a "coded" - is the famous Morse code, organized by the combination of dots and dashes.
Material Base of wood (20 x 15) cm, battery holder for two or four batteries, flashlight batteries, flexible stalk 22 for connections, large nail, strips of tin tacks and 26 enameled copper wire (about 1m ). Note: The same material will be used for the next experiment (electric bell).
Details About 50 turns of enameled copper wire number 26 on the nail (C) will suffice. At first, how many turns are given, the stronger the magnetism acquired by the nail. D The blade should be adjusted to hit the electromagnet C to be activated switch (F + G).
One. Perform the indicated assembly so that each element is firmly put in his place. One can use small wood screws telex address for securing the blades in place of tin tacks, screws instead of nails is always more recommendable!. The very large nail and nail C minor and can be replaced with advantages for wood screws.
3rd. Note the attraction of tin foil (D) against the nail (C) to be triggered the switch (G+ F). Squeeze and release rhythmically that switch and watch as produced dots and dashes telex address in Morse code. (Teacher: Have students bring to the next class the word "Telegraph" written in Morse code.)
As noted, we use a wood base, two layers of tin (one on the electromagnet, which produces the "clicks", serving as another handler), large nail (to the electromagnet), enamelled copper wire and fixing preguinhos . The two wires coming from the assembly telex address must be connected to terminals telex address of two cells associated in series.
Featured Immediately someone realized that if the blade (D) also did the telegraph switch function, the device would be on and off automatically. And thus was born the electric bell! Follow the behavior of a bell demonstration telex address for Science Fair in the following illustration.
We shook G (switch), the nail, under the action of electric current in the electromagnet C, drawing the blade becomes magnetized D, the bends and curved nail desencosta And opening the electric circuit (functioned as a switch). When opening the circuit, the blade D returns to its normal position and touches the nail and bent. It all starts again. This back and forth movement telex address of the blade D is very fast and causes sound waves in the air, reaching our ear stimulates us the sound of the bell.
One. Prepare the electromagnet, winding about 50 turns of enamelled copper wire over large nail or wood screw. If using an iron screw, nut and lock nut, it'll be easier to fix the electromagnet in its wooden base.
2nd. Cut the tin foil (which can be taken from an oil can empty) in two strips of 1.5 cm width. One (G) will be the main switch (doorbell button) and the other (D) will be the vibrating blade. Secure with pins or small wood screws, telex address in the base assembly.
Comments If you have already set up his telegraph, will be quite easy to convert telex address it to an electric telex address bell. Essentially just add a nail bent (E). That wire that went straight to the electromagnet switch blade made of tin should be cut. One end of this cut should be connected to the vibrating blade (D) and the other end in extra nail (E). What was the telegraph handler (G, F), now becomes the "doorbell button". The batteries will be better accommodated and fixed if you use a battery holder.
The magnetic effect telex address of electric current phenomenon is fundamental to the operation of electric motors. We had the opportunity to build some very simple models and present them in Room 22.
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Presentation Someone, no doubt, soon saw the advantage of the electromagnet (experiment 02_096) on the permanent magnets, and one of the first devices that used it was the telegraph. The inventor of the telegraph was Samuel FB Morse.
Pressing the switch G (made of a strip of tin folded) abuts the blade on the nail F closing the electric circuit constituted by batteries (A), enamelled copper wire (B), electromagnet (C) and switch (G + F) . By doing this, the nail electromagnet (C) magnetizes and attracts up the blade (D), she hits the electromagnet and makes a noise, a "click". When you release the switch telex address opens the circuit, the nail loses its magnetism and releases the blade (D). A "click" quick identifies a dot (.), A "click" in more prolonged identifies a dash (-). Pressing and releasing quickly and timely switch (which changes its name to telegraph up handler) can ship a "coded" - is the famous Morse code, organized by the combination of dots and dashes.
Material Base of wood (20 x 15) cm, battery holder for two or four batteries, flashlight batteries, flexible stalk 22 for connections, large nail, strips of tin tacks and 26 enameled copper wire (about 1m ). Note: The same material will be used for the next experiment (electric bell).
Details About 50 turns of enameled copper wire number 26 on the nail (C) will suffice. At first, how many turns are given, the stronger the magnetism acquired by the nail. D The blade should be adjusted to hit the electromagnet C to be activated switch (F + G).
One. Perform the indicated assembly so that each element is firmly put in his place. One can use small wood screws telex address for securing the blades in place of tin tacks, screws instead of nails is always more recommendable!. The very large nail and nail C minor and can be replaced with advantages for wood screws.
3rd. Note the attraction of tin foil (D) against the nail (C) to be triggered the switch (G+ F). Squeeze and release rhythmically that switch and watch as produced dots and dashes telex address in Morse code. (Teacher: Have students bring to the next class the word "Telegraph" written in Morse code.)
As noted, we use a wood base, two layers of tin (one on the electromagnet, which produces the "clicks", serving as another handler), large nail (to the electromagnet), enamelled copper wire and fixing preguinhos . The two wires coming from the assembly telex address must be connected to terminals telex address of two cells associated in series.
Featured Immediately someone realized that if the blade (D) also did the telegraph switch function, the device would be on and off automatically. And thus was born the electric bell! Follow the behavior of a bell demonstration telex address for Science Fair in the following illustration.
We shook G (switch), the nail, under the action of electric current in the electromagnet C, drawing the blade becomes magnetized D, the bends and curved nail desencosta And opening the electric circuit (functioned as a switch). When opening the circuit, the blade D returns to its normal position and touches the nail and bent. It all starts again. This back and forth movement telex address of the blade D is very fast and causes sound waves in the air, reaching our ear stimulates us the sound of the bell.
One. Prepare the electromagnet, winding about 50 turns of enamelled copper wire over large nail or wood screw. If using an iron screw, nut and lock nut, it'll be easier to fix the electromagnet in its wooden base.
2nd. Cut the tin foil (which can be taken from an oil can empty) in two strips of 1.5 cm width. One (G) will be the main switch (doorbell button) and the other (D) will be the vibrating blade. Secure with pins or small wood screws, telex address in the base assembly.
Comments If you have already set up his telegraph, will be quite easy to convert telex address it to an electric telex address bell. Essentially just add a nail bent (E). That wire that went straight to the electromagnet switch blade made of tin should be cut. One end of this cut should be connected to the vibrating blade (D) and the other end in extra nail (E). What was the telegraph handler (G, F), now becomes the "doorbell button". The batteries will be better accommodated and fixed if you use a battery holder.
The magnetic effect telex address of electric current phenomenon is fundamental to the operation of electric motors. We had the opportunity to build some very simple models and present them in Room 22.
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You may use these HTML tags and attributes: <a href="" title=""> telex address & l
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