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Electromagnetic waves are waves that consist of vibrating electric and magnetic fields. They transfer energy through matter or across space. … This causes a vibrating electric field which in turn creates a vibrating magnetic field. The two vibrating fields together form an electromagnetic wave.
Contents
- 1 What do electric forces and magnetic forces have in common?
- 2 How did Oersted discover the relationship between electricity and magnetism?
- 3 How can you say that electricity and magnetism are interdependent?
- 4 What did Hans Oersted discover about the relationship between electricity and magnetism?
- 5 What other electronics rely on magnetism and electromagnetism?
- 6 What is the relationship between electromagnetic and electric motor?
- 7 Are current and magnetism in a conductor directly or inversely related?
- 8 Can produce electricity to make a magnet?
- 9 Why does electric current create magnetic field?
- 10 What are the basic similarities and differences between an electric field and a magnetic field?
- 11 How are electric and magnetic fields created?
- 12 What is the relation between electric field and electric potential?
- 13 How are moving electric charges related to electric and magnetic fields?
- 14 What do electric and magnetic fields contain and transport?
- 15 Is electricity an electromagnetic wave?
- 16 How was magnetism discovered?
- 17 When an electric current in the wire increases the magnetic field produced by it?
- 18 How does the relationship of electricity and magnets play a role in how a motor operates?
- 19 What initial observation in 1820 did Oersted make about the relationship between electricity and magnetism?
- 20 What is the relation between magnetic force and distance?
- 21 What affects the electromagnetic magnetism?
- 22 What devices use electricity and magnetism?
- 23 What is the difference between magnetism and electromagnetism?
What do electric forces and magnetic forces have in common?
Electric and magnetic forces are non-contact forces which means objects exerting these forces on each other don’t need to be touching. The two types of forces are related a moving magnet can make electrical charges move cause an electric current and in turn cause magnetism.
How did Oersted discover the relationship between electricity and magnetism?
In 1820 Oersted discovered by accident that electric current creates a magnetic field. Prior to that scientists thought that electricity and magnetism were unrelated. Oersted also used a compass to find the direction of the magnetic field around a wire carrying current.
How can you say that electricity and magnetism are interdependent?
Electricity and magnetism are closely related to each other. The electric current flowing through the wire produces a circular magnetic field outside the wire. The direction (clockwise or counter-clock wise) of this magnetic field is depends on the direction of the electric current.
What did Hans Oersted discover about the relationship between electricity and magnetism?
In 1820 a Danish physicist Hans Christian Oersted discovered that there was a relationship between electricity and magnetism. By setting up a compass through a wire carrying an electric current Oersted showed that moving electrons can create a magnetic field.
What other electronics rely on magnetism and electromagnetism?
Magnetic and electromagnetic fields play important roles and are fundamental to electronic and electromechanical systems. Motors generators speakers microphones computer storage devices like hard drives and many other devices are based upon magnetic electromagnetic principles.
What is the relationship between electromagnetic and electric motor?
An electric motor is a device that uses an electromagnet to change electrical energy to kinetic energy. When current flows through the motor the electromagnet rotates causing a shaft to rotate as well.
The magnetic field due to current flowing in a ling straight conductor is directly proportional to the current and inversely proportional to the distance of the point of observation from the conductor.
Can produce electricity to make a magnet?
Metals such as copper and aluminum have electrons that are loosely held. 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.
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Why does electric current create magnetic field?
A magnetic field is generated by an electric current. While an electric charge is moving this is possible. … The magnetic field is generated when the atom spins and orbits the nucleus. The direction of the magnetic field is also dictated by the direction of the electric charge’s spin and orbiting.
What are the basic similarities and differences between an electric field and a magnetic field?
Similarities Between Electric and Magnetic Fields
| Electric Field | Magnetic Field | |
|---|---|---|
| Cause | Electric charge | Magnets or electric currents |
| Affects | Charges | Magnets or electric currents |
| Types of ‘Charge’ | Positive and negative | North and south poles |
| Force rule | Like charges repel unlike charges repel | Like poles repel unlike poles attract |
How are electric and magnetic fields created?
Feedback loop
the electric and magnetic fields are generated by moving electric charges the electric and magnetic fields interact with each other the electric and magnetic fields produce forces on electric charges the electric charges move in space.
What is the relation between electric field and electric potential?
The relationship between potential and field (E) is a differential: electric field is the gradient of potential (V) in the x direction. This can be represented as: Ex=−dVdx E x = − dV dx . Thus as the test charge is moved in the x direction the rate of the its change in potential is the value of the electric field.
when the electric charge vibrates the eletric field around it changes causing the magnetic field to change causing the electric field to change and the process continues to create and change the fields. They are perpendicular to eachother and travel outward from the moving charge.
What do electric and magnetic fields contain and transport?
What do electric and magnetic fields contain and transport? Energy.
Is electricity an electromagnetic wave?
So electricity is not an electromagnetic wave but can generate a disturbance in the associated electromagnetic field that has the ability to spread like a wave. … The energy of current is transmitted as EM waves.
How was magnetism discovered?
Magnetism was first discovered in the ancient world when people noticed that lodestones naturally magnetized pieces of the mineral magnetite could attract iron. … They sculpted a directional spoon from lodestone in such a way that the handle of the spoon always pointed south.
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When an electric current in the wire increases the magnetic field produced by it?
Magnetic field produced by electric current is decreased as the distance of the current is increased from the wire can be shown with the help of a magnetic compass. EXPLANATION: When a magnetic compass is placed close to the current carrying conductor it shows more deflection.
How does the relationship of electricity and magnets play a role in how a motor operates?
An electric motor converts electrical energy into physical movement. Electric motors generate magnetic fields with electric current through a coil. The magnetic field then causes a force with a magnet that causes movement or spinning that runs the motor.
What initial observation in 1820 did Oersted make about the relationship between electricity and magnetism?
During an evening lecture in April 1820 Ørsted discovered that a magnetic needle aligns itself perpendicularly to a current-carrying wire definite experimental evidence of the relationship between electricity and magnetism.
What is the relation between magnetic force and distance?
Magnetic force obeys an inverse square law with distance. The equation for magnetic force is similar to Coulomb’s Law (if you are familiar with it). But the key point is that the force is inversely proportional to the distance squared (i.e. it obeys an inverse square law with distance).
What affects the electromagnetic magnetism?
Factors Affecting the Strength of the Magnetic Field of an Electromagnet: Factors that affect the strength of electromagnets are the nature of the core material strength of the current passing through the core the number of turns of wire on the core and the shape and size of the core.
What devices use electricity and magnetism?
Electromagnets are very widely used in electric and electromechanical devices including:
- Motors and generators.
- Transformers.
- Relays.
- Electric bells and buzzers.
- Loudspeakers and headphones.
- Actuators such as valves.
- Magnetic recording and data storage equipment: tape recorders VCRs hard disks.
- MRI machines.
What is the difference between magnetism and electromagnetism?
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