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Which is true of magnetic field lines but not electric field lines?
Wiki User
∙ 11y ago
they show wich way iron shavings would align themselves
They always make closed loops.
Electric field lines can either form closed loops or they can start and finish on isolated electric charges. Magnetic field lines always only form closed loops.
Wiki User
∙ 11y ago
Alex lieseil
Wiki User
∙ 13y agoOne represents a field of one kind, the other represents a different kind.
true
Answer 2
I wonder what you mean by an electric field. You may mean the magnetic field produced by an electromagnet as opposed to a permanent magnet. Well, they are both the same.
AnswerAs far as electrical conductors are concerned, a magnetic field is produced by an electric current, whereas an electric field is produced by potential.The magnetic field produced by a current surround the conductor and, viewed from one end of that conductor, are represented by concentric circles.
An electric field is set up between a charged conductor and adjacent conductors and/or earth (ground). Viewed from one end of the conductor, these are represented as lines that radiate outwards from the conductor.
So, a magnetic field and an electric field act at right-angles to each other.
Wiki User
∙ 13y agoMagnetic field lines must be closed. There is no such thing as a magnetic monopole. A magetic field line might be very long but eventually it will bend aroung forming a closed loop.
Electric field lines can originate from a point (hence they are open). A charge (like an electron) is a electric monopole. They show which way iron shavings would align themselves.
They always form complete loops.They show which way iron shavings would align themselves. (APEX)Wiki User
∙ 11y agoThe list of choices submitted with the question contains
no correct description of magnetic field lines.
Anonymous
they show which way iron shavings would align themselves
Anonymous
Is it possible to find a magnetic monopole? (drawing the magnetic field lines)
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How closely packed the electric field lines are indicates the strength of the electric field?
true
Which is true electric current running along a wire can be used to produce magnetic force or moving electrons through a magnetic field can produce an electric current?
They're both true, but I'm not comfortable with the way they're stated. I would have said: -- Electric current through a wire produces magnetic force. -- Moving electrons constitute an electric current, whether or not they're moing througha magnetic field.
An electric motor converts electrical energy to potential energy True or false?
It is false that an electric motor converts electrical energy to potential energy.
Can an electric current generate an electromagnetic wave?
Not a constant electric current but a changing one will generate electromagnetic waves.First: If you have a lone electron, and it is accelerated in any way, it will send off an electromagnetic wave. This is because a changing electric field generates a magnetic field.It is also true that changing magnetic field will generate an electric field. This is the reason that if you have an electric current, which is generating a magnetic field, and you change the current you generate an electromagnetic wave. To generate a continuous sinusoidal electromagnetic wave you continuously change the current sinusoidally.
Why does a compass needle move when placed near a wire carrying an electric current?
True... The wire carring current creates a slight magnetic field.
Is it true or false that an electric charge creates a magnetic field?
Opposites attract, like charges repel each other.
A moving magnet produces an electric current is this true?
A changing magnetic field produces an electric current, so yes. This is true.
How closely packed the electric field lines are indicates the strength of the electric field?
true
Which is true electric current running along a wire can be used to produce magnetic force or moving electrons through a magnetic field can produce an electric current?
They're both true, but I'm not comfortable with the way they're stated. I would have said: -- Electric current through a wire produces magnetic force. -- Moving electrons constitute an electric current, whether or not they're moing througha magnetic field.
Magnetic field lines curve out from one pole and return to the same pole true or false?
False.
An electric motor converts electrical energy to potential energy True or false?
It is false that an electric motor converts electrical energy to potential energy.
One of the differences between electric and magnetic fields is that magnetic field lines always form closed loops?
One of the differences between electric and magnetic fields is that magnetic field lines always form closed loops. true
True or false any material that exerts magnetic force is considered a magnet?
It is true that materials that exert magnetic forces are considered magnets. This is the case since it shows they have magnetic field lines that may have been induced or were naturally present in the materials.
Can an electric current generate an electromagnetic wave?
Not a constant electric current but a changing one will generate electromagnetic waves.First: If you have a lone electron, and it is accelerated in any way, it will send off an electromagnetic wave. This is because a changing electric field generates a magnetic field.It is also true that changing magnetic field will generate an electric field. This is the reason that if you have an electric current, which is generating a magnetic field, and you change the current you generate an electromagnetic wave. To generate a continuous sinusoidal electromagnetic wave you continuously change the current sinusoidally.
Can you make a magnet without using a magnetic material Explain?
If you are referring to a magnet as an object that possesses a permanent magnetic field, then yes. There are three circumstances where magnetic fields exist, but not as a result of a permanent magnet. 1. Electric current causes a magnetic field. Thus, any wire carrying a current or even a current without a wire (like a lightning bolt) will be surrounded by a magnetic field. Since electric current is made up of moving electric charges, it is actually true than any moving electric charge creates a magnetic field. 2. It is difficult to observe outside of a scientific laboratory, but when there is an electric field that is varying in time, that creates a magnetic field. Though not easy to demonstrate directly, this turns out the physical phenomena the allows the creation of elecrtromagnetic waves, e.g. like the light we see with our eyes. 3. Thirdly, one can cause materials that are not able to work as permanent magnets to act as temporary magnets. This is the basis for electromagnets. A steel or iron core with an electric current running through a coil surrounding the core will produce a magnetic field. If you simply cut off the power source, the electric current will no longer flow through the coil. No electric current, no magnetic field. When a non-permanent magnet is created, the magnetic field it produces is just the same as the magnetic field of a permanent magnet, until the source is removed and the field disappears. All of these matters together are an essential part of the basics of electromagnetism which describes how and why the phenomena work.
Why does a compass needle move when placed near a wire carrying an electric current?
True... The wire carring current creates a slight magnetic field.
Under what circumstances can electrical charges produce a magnetic field?
Yes, a moving electric charge creates a magnetic field around its path of travel, and this is true for any charged particle. Further, it is the basis for the idea that the electromagnetic force is one force. Physics views electric fields and magnetic fields as being derived from just that one force we mentioned. When we see charges moving continuously, we will see a "standing" magnetic field around the current path. And the magnetic field can be made to do many useful things. This is the idea behind almost all electric power generation around the world as well as countless electronic applications.
