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Because the molecules in gasoline are inherently non-polar, it takes an extremely strong magnet to cause any polar effect on them. Even the electromagnets used on cranes to pick up junk cars and move them around in junk yards are not strong enough to change the polarity of gasoline noticeably. Any magnet strong enough to induce a noticeable polarity in the molecules in the gasoline would have a catastrophic effect on the metal moving parts of the engines it is burned in and as soon as the gasoline was removed from the magnetic field of the magnets it would revert to its normal non-polar state. Magnets cannot induce any permanent change in the polarity of gasoline.
As a caveat - a little bit of polar materials are often added to gasoline to aid in complete combustion and to impart some engine cleaning properties to the gasoline, but even those molecules are not very much affected by anything short of extremely strong magnetic fields, albeit not quite as strong as are required to affect non-polar molecules. No magnet you could fit under the hood of a car would be strong enough to have any noticeable effect on the gasoline - the only effect you could hope to see would be to have a magnet messing up the movement of the metal parts of the engine.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoit is now possible to turn a permanent magnet off. Research this on YouTube, there are videos on how do to this with electricity. the electricity input on the wire in a certain position with the magnet diminishes its magnetic field when the electricity is turned on, when the electricity is turned off, the magnetic field returns as normal
Wiki User
∙ 14y agoOnly for electromagnets
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Can you twist polar bonds with magnets?
No. Polar bonds are caused buy an unequal distribution of electrons in the chemical bond, the polarity is electrostatic not magnetic so magnets have no effect.
Do magnets repel nonmagnetic materials?
Magnets attract magnetic materials such as iron. Magnets either attract or repel other magnets depending on the polarity. Magnets repel diamagnetic materials. Most diamagnetic materials (bismuth, diamond, graphite, silver) are only weakly repelled. Super conductors are strongly diamagnetic, and are more strongly repelled.
How does the polarity of water assist the movement of molecules?
The movement of molecules are very important on earth, and they happen in and on every living organism. (totally wrong above this) Think of water molecules as magnets; each with an opposing pole. Like magnets, water molecules repel each other when two parts of the same pole are pushed together. The polarity of the water does the same thing, pushing the molecules apart.
What materials will magnets repell?
REPULSION OF MAGNETS:ANS:Magnets repel those materials who have opposite polarity to the magnet's.If a material is charged negative then a positive poled magnet will repel it with an electromagnetic force.
What is polarity of a magnet?
All magnets have a north and a south pole. There is a theoretical particle called a unipole which can be either just a north or south pole. No one has ever found one.
What is the use of a magnet in a motor?
Magnets are used in motors to create motion. Magnets have two kinds of polarity, positive (north) and negative (south). When two magnets of the same polarity are facing each other, they will be attracted to each other. Conversely, if the polarity of the the two magnets are opposites than they two magnets will be repulsed. This concept of rotational motion is what is occurring in a motor.
When do 2 magnets repeal one another?
when they have the same polarity
How are magnets different other than shape and size?
polarity maybe
How magnetic trains stop?
By reversing the polarity of the magnets and there are also friction brakes.
What kills protista?
magnets fire gasoline and firewood
Can you twist polar bonds with magnets?
No. Polar bonds are caused buy an unequal distribution of electrons in the chemical bond, the polarity is electrostatic not magnetic so magnets have no effect.
Do waves have magnetic polarity?
No, waves do not have magnetic polarity. Waves are disturbances or vibrations that propagate through a medium or space, and they do not possess magnetic properties. Magnetic polarity is a characteristic of magnetic materials such as magnets, where they have a north and south pole.
When a magnet splits why does the polarity change?
The polarity of a magnet does not change if the magnet is cut into pieces. Each piece has the same polarity that it had before. In particular, if you break a bar magnet in half at the midline between the two poles, you will end up with two magnets N-S and N-S. No reversal of polarity occurs.
What would happen to electronics magnets etc if the earths magnetic poles changed?
Nothing - The polarity of an electromagnet depends on the direction of current flow and you can effect the same change in orientation to the earth's field by moving the electromagnet rather than the earth's field.
How do Maglev trains come to a stop?
There are magnets on the train and also on the guide rails. The polarity of the magnets can be set one way for accelerating, and the opposite way for braking. There's a flash vid at the link below.
What is magnetic polarity?
A magnet has a polarity, in that one end is the "north" and the other is the "south". Opposite poles attract but similar poles repell each other. You cannot make the north poles of two magnets stick together.
Why are permanent magnets not used in cranes to lift heavy loads?
They can become demagnetized by impact, if they're picking up something which is also magnetic (which steel is), the magnet would need to be changed when the polarity was wrong, and then there's the matter of how you detach the magnet once you got the load into place.
