No you can have a magnetic field without an electric field. Consider a rod with an equal number of positive and negative charges (such that they are equally spaced). Let the positive move to the left with speed v and the negative to the right with speed v. This will result in a magnetic field but no electric field..
Similarly, you may ask, is there always a magnetic field with an electric field?
A magnetic field is really just an electric field in relative motion. So if, for instance, an electron is just sitting there, and you are not moving relative to it, all that you measure is an electric field. But if the electron flies past you, then you experience a magnetic field due to the moving charge.
Beside above, can magnets create infinite energy? Magnets might have infinite energy in two ways: Through time: It looks like a magnet might have infinite energy because it can lift paperclips forever. Through space: If you know the strength of the magnetic field you can calculate the energy density in that region.
People also ask, how is magnetism related to electricity?
Electricity and magnetism are two related phenomena produced by the electromagnetic force. Together, they form electromagnetism. A moving electric charge generates a magnetic field. A magnetic field induces electric charge movement, producing an electric current.
What is electric field made of?
Electromagnetic fields, which include static electric and magnetic fields, are indeed made of photons. From a particle physics perspective the Quantum Electrodynamics as a model of particles carrying electric charge interacting via photons has a spectacular agreement with experiment.
Related Question Answers
What is the difference between B and H?
B is magnetic flux density, whereas H is magnetic field intensity. H has units of amp-turn/meter, whereas B has units of weber/turn-meter^2.Is electric field real?
The correct statement is that electric fields and magnetic fields are both fundamental, both are real, and both are part of one unified entity: the electromagnetic field.Can a magnetic field exist in a vacuum?
Yes, magnetic fields can exist in perfect vacuum.How is electric field defined?
Electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it would exert on a positive test charge. The electric field is radially outward from a positive charge and radially in toward a negative point charge.Does magnetic field really exist?
As far as we know, magnetic monopoles don't exist in nature and all magnetic field sources are dipolar in nature. Most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them.Which is stronger electric field or magnetic field?
The higher the voltage, the stronger the electric field at a given distance from the wire. Electric fields are strongest close to a charge or charged conductor, and their strength rapidly diminishes with distance from it. The higher the current, the greater the strength of the magnetic field.How does changing magnetic field produce electric field?
Changing magnetic fields induce electric currents in copper and other conductors. A charged particle experiences no magnetic force when moving parallel to a magnetic field, but when it is moving perpendicular to the field it experiences a force perpendicular to both the field and the direction of motion.What is magnetism caused by?
Magnetism is the force exerted by magnets when they attract or repel each other. Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. Each atom has electrons, particles that carry electric charges.Can a magnet power a light bulb?
If you connect the two ends of the wire to a light bulb and create a closed loop, then the current can flow. Unfortunately, however, the current created by moving a magnet over a single wire doesn't provide enough energy quickly enough to actu- ally light the bulb.Why is magnetism important?
Maxwell showed mathematically how a changing magnetic field creates a changing electric field (and vice versa). Therefore, magnetism is very important because we use it to create electrical energy. In fact, most of the energy that we use today comes from rotating magnets (see below).Is electricity and magnetism the same?
3) Electricity and magnetism are essentially two aspects of the same thing, because a changing electric field creates a magnetic field, and a changing magnetic field creates an electric field. (This is why physicists usually refer to "electromagnetism" or "electromagnetic" forces together, rather than separately.)How is electricity made?
Power stations convert fuels into electricity Coal and gas are burned to heat water and turn it into steam. The steam, at a very high pressure, is then used to spin a turbine. The moving magnets cause electrons in the wires to move from one place to another, creating an electrical current and producing electricity.What do u mean by magnetic field?
The magnetic field is the area around a magnet in which there is magnetic force. Moving electric charges can make magnetic fields. Magnetic fields can usually be seen by magnetic flux lines. At all times the direction of the magnetic field is shown by the direction of the magnetic flux lines.What are domains in magnetism?
A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction. These are the ferromagnetic, ferrimagnetic and antiferromagnetic materials.Who discovered that electricity and magnetism are related?
Starting about a decade after Oersted's discovery, Michael Faraday demonstrated essentially the opposite of what Oersted had found–that a changing magnetic field induces an electric current. Following Faraday's work, James Clerk Maxwell developed Maxwell's equations, formally unifying electricity and magnetism.What is the name of a magnet made from a coil of wire?
Electromagnets
Can we generate electricity from magnets?
Magnetic fields can be used to make electricity Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current. Electricity generators essentially convert kinetic energy (the energy of motion) into electrical energy.Are magnets free energy?
Because magnets do not contain energy — but they can help control it… “This is the magnetic force that converts the energy of wind and coal and nuclear fuel to the electricity that's sent out into the power grid.” Much of that grid is managed by using principles of magnetism, as well.Can we produce electricity from gravity?
Hydroelectric dams may use water, but they also use gravity to help produce electricity. The same goes for tidal generators. In order to generate electricity using gravity force you must find a source where gravity causes movement. Movement is kinetic energy, and you need to convert that into electricity. 
