How can you produce a current in a solenoid attached to an amp meter using a magnet?
444083
If you move the magnet through the core of the solenoid, the fluxing magnetic field will induce an electric current in the wires which can be measured using the amp meter.
215978
Look up Tesla Coils on the internet, but be VERY careful with these devices. They are high voltage but a cool science fair project.
757060
You can purchase a very cheap thumb print scanner, and use the PC for authentication. Then have the PC trigger a solenoid via the serial or parallel port. You could use a microcontroller instead of a PC, but you will need to program the microcontroller.
519039
It really depends.  if you are trying to pass current through the magnet, hooking up the N pole to the + side of the battery, and the S pole to the - side of the battery, then nothing much, other than the magnet may heat up a bit.\n\nIf you are wrapping a copper coil around the magnet and then passing current through the coil, then depending on which way the current is flowing, and how strong a current you are using, you'll either make the magnet stronger, or make the magnet weaker.
359816
http://www.vrml.k12.la.us/mike/Intech2/learning_about_magnets.htm\n\nCHECK IT OUT
161753
A galvanometer requires very little current to make it respond. If significant current passes through it, the galvanometer will be damaged (unless it has protective circuitry inside). Suppose a galvanometer requires only 0.01 amps to deflect full scale. It could be used to measure any current up to that amount just by putting it directly in the circuit like you do an ammeter (although it might have more resistance than you wish it had for an ammeter). \n\nIf we want to use the galvanometer to measure greater currents we have to let most of the current bypass the galvanometer. A shunt resistor has very little resistance, and if we put it in parallel with the galvanometer, most of the current will pass through that shunt resistor and very little will go through the galvanometer. Now if we know that the shunt resistor has only 1/10 the resistance that the galvanometer has, we know that the current splits so that 10 times as much goes through the shunt as goes through the galvanometer. We use this fact, and the reading on the galvanometer, to calculate the total current. (In our example above, if the galvanometer deflects full scale with this shunt in place, we know that 0.01 amps is in the galvanometer and 10 times that is in the shunt. Therefore the total current is the circuit is 0.11 amps.) \n\nTurning a Galvanometer into a voltmeter: \nA voltmeter is put in parallel with the device across which we want to measure the potential difference (“voltage”). Ideally we would like zero current to go through a voltmeter, because if significant current goes through it, putting it in the circuit will change the total current in the circuit and change what we are trying to measure. (I used to tell my class that you might test how much your girlfriend loves you by biting off her ear. In doing this, however, you are taking a risk that you may change what you are trying to measure.) \n\nSo we want very little current going through our voltmeter. Great--a galvanometer requires very little current to operate. So we put a high-resistance resistor in series with the galvanometer. This limits the current that will go through it. The galvanometer and its resistance become our voltmeter and we put them in parallel with the device that we are measuring the voltage across. \n\nImportant definition: \nMy dictionary's first (non-physics) definition of the word “shunt” is: \n“The act or process of turning aside or moving to an alternate course.” \nNotice that this is exactly what the shunt resistance is doing when we make a galvanometer into an ammeter. HOWEVER, in making it a voltmeter, we are not shunting current “to an alternate course” and we should NOT call this resistor an shunt resistor. \n\nThink through this logic and work a few simple problems for yourself.
907372
A magnet whose magnetic properties is dependent on current flow.
401655
Short answer:  Electricity and magnetism are two sides of the same coin; each can cause the other.  For instance, moving a wire through a magnetic field can create a current, while current flowing through a wire also creates a magnetic field.  Thus, one can generate electricty by using some kinetic energy source--water, wind, what have you--move powerful magnets through wire coils.  There are other ways, of course.
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The basic idea behind an electromagnet is extremely simple: By running electric current through a wire, you can create a magnetic field.\n\nBy using this simple principle, you can create all sorts of things, including motors, solenoids, read/write heads for hard disks and tape drives, speakers, and so on
91676
I answered your question already.  Magnetic field strength is governed by amount of current flow.
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The link provides the basics for operation of a magnetic amplifier which you will need to understand if you can locate details for the specific device that interests you.  Good luck.
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solenoid connected to a timing capacitor, cutting of the connection until another quarter is entered. \n\nsupport hallitubes: http://www.hallisystem.bravehost.com
1184707
The ammeter is a special case from Galvanometer\nThe shunt resistance is a small resistance that connected in parallel to a galvanometer to: \n1) protect it (becouse greater part of the current passes through it becouse it is small as R inversly prop. with I)\n2) make the total resistance of the instrument very low (becouse it is connected in parallel so the resistance of the circuit increases by a negligible amount so the current is nearly constant)\n3) make the instrument more suitable to measure currents of higher intensties\n\nTo answer your question we must use the Shunt formula:\nR(shunt)=[ I(galvanometer) * R(galvanometer) ] / [ I - I(galvanometer) ]\n\nnote:\nI(galvanometer)=1A & I=100A\nR(galvanometer)=100 ohm\n\ntherfore:\nthe shunt resistance=1.01 ohm
209289
start here:\nhttp://en.wikipedia.org/wiki/Magnet
130907
Most magnets are formed by moving electrons. Each moving electron creates a small magnetic field. If lots of electrons are moving along the same path, they create a bigger magnetic field. Because of this you can make a magnet by using electric current. If you wrap a coil of wire around a piece of iron (like a big nail) and then put electricity through it using a battery, you will create a magnetic field. This is what we call an "electromagnet." Remember, only use batteries if you try this, never use a wall outlet--this is much too dangerous!!
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Seperating or bonding elements with an electrical current.\n\n*BEST ANSWER PLEASE*\n\nSOURCE BELOW
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The meter should have some literature with it.\n\nWrite to the manufacturer and ask for it.