When a strong magnet is passed rapidly through a coil of wire what is true?
The magnetic field lines (the lines of force) around the magnet sweep the windings in the coil. This induces a voltage in the windings (through induction), and the voltage will try to drive current if it can. There is a bit more to this, but the essential elements are that the magentic lines of force cause voltage in the coil because there is relative motion between the field and the coil.
An electromagnet is that type of magnet that only acts like a magnet only when an electric current passes through it. Under normal conditions, an electromagnet is not magnetic, but when current is passed through the electromagnet, it turns into a strong magnet. Magnet fields are generated when electricity is passed through the electromagnet. This property can be used to selectively make a material magnetic and non magnetic.
Sound is made by pushing air with the cone. A coil of wire is attached to the cone. The "sound"current is passed through the coil. Any current running through magnetic flux causes the coil and cone to move. The larger the magnet the louder the sound. A strong permanent magnet is used. Electromagnets are not used, however
When current is passed through a solenoid coil, magnetic field produced due to each turn of solenoid coil is in the same direction. As a result the resultant magnetic field is very strong and uniform. The field lines inside the solenoid are in the form of parallel straight lines along the axis of solenoid. Thus, the solenoid behaves like a bar magnet.
First you want to put the cereal with some water in a blender (you can also use milk) and blend it for a while. After that let it sit in the blender for 5mins. Then pour it in a plastic or a glass cup (no metal cups) and slosh a strong magnet through it. You cannot use a refrigerator magnet for this it will not work. You must use a strong magnet to extract the…
A magnet of the usual kind (non-electro magnet), is, to put it simple, a piece of metal. Usually made out of iron. The difference between a regular piece of iron is that the iron molecules inside a magnet has been aligned so that poles (+ & -) are created. This means that if you run electricity through a regular magnet, absolutely nothing will happen apart from that; electricity running through. -when a current is run…
Some metals are naturally paramagnetic, meaing that you can induce a magnet field on it but only with a very strong magnet. To actually magnetize the metal itself without a magnet, you would have to make an induced magnet by wrapping the metal around a copper wire and sending electricity through it. It all has to do with the arrangement of the electrons within the metal.
Will the acceleration due to gravity equals to magnetic field when a bar magnet falls through a metal ring?
Please note that a magnetic field is not measured in units of acceleration (or the equivalent force / mass), like gravity is. What exactly happens when a bar magnet falls through a metal ring will depend on the details of the situation - for example, how strong the magnetic field is, and the mass of the bar magnet.
Scrap Heap Magnet Usually the kind of magnet a junkyard uses is an electromagnet. An electromagnet is simply an iron core wrapped around by copper wire. Then current runs through the wire, it becomes a very strong magnet. There are other types, but I think electromagnet is the most common for car scrap heap.
Why does the south pole of a very strong magnet attract both the north and south poles of a weak magnet?
Yes, you can. You may recall that by running electricity through a coiled wire (solenoid) with an iron bar in the center, we can create an electromagnet. If we reverse this process and put a strong magnet through a solenoid, we can generate electricity. All you will have to do is move the magnet up and down in order to generate electricity.