We all heard about the attractive nature of the magnet, and we know that the magnet has the property of attracting ferromagnetic materials such as iron, nickel, steel, and cobalt.
The attractive force exerted by the magnet is called the magnetic field.
- Heating effect
- Chemical effect
- Magnetic effect
What is the magnetic effect of electric current
The flow of electric current in a conductor with the properties of magnetism is called the Magnetic effect of electric current. It is observed through the deflection of a magnetic needle in a magnetic compass. In physics, they say electromagnetic effect(Electricity + magnetism).
Why it is not possible to feel the magnetic effect of the current-carrying wire?
A current-carrying wire behaves like a magnet, but we cannot feel its effect because the strength of the magnetic field is very weak.
Why we have to study the magnetic effect of electric current?
The magnetic effect of the current is used in many devices. Electromagnetism playing one of the major roles in modern technology. So from my point of view electromagnetism is one of the main fields.
History of the magnetic effect of current
When we dig deep into history, the physicist and chemist Hans Christian oersted (1777-1851) discovered the magnetic effect of current by identifying the relationship between electricity and magnetism with the help of a magnetic compass.
He was one of the leading scientists of the 19th century and gave lectures on the topic of physics and chemistry, which were very popular among the general public.
In April 1820, during the preparation of his lecture, he accidentally noticed a small deflection in the magnetic compass next to the current-carrying conductor.
Surprised to see it, he did an experiment by placing a compass needle underneath a current-carrying wire and turned on the electric current. The needle of the compass showed deflection.
Through a series of experiments, Hans Christian oersted proved that electricity creates a magnetic field and they were interconnected. He also mentioned that the moving charges of the current create a magnetic field around the conductor. After his experiment came the modern study of "electromagnetism".
How can we know the shape of the magnetic field line?
Iron filling
Magnetic field line
In the current-carrying conductor magnetic field propagates through space in the form of a concentric circle. The magnetic field is invisible, so it can be represented by diagrammatic or imaginary lines. That is called a magnetic field line.
Magnetic flux
SI unit of the magnetic field
Did you know?
How to find the direction magnetic field line right-hand thumb rule?
The magnetic field line has a certain direction that is clockwise or anti-clockwise. The direction of magnetic field lines depends on the direction of the current flow. The direction of the electric current plays an important role in identifying the direction magnetic field.Maxwell right-hand thumb rule
- The right-hand thumb indicates current &
- Closed fingers direction indicates the direction of the magnetic field
The magnetic field in a straight wire
The magnetic field in a circular loop
Strength of the magnetic field in a circular conductor
The polarity of the circular loop
- If the observer stands in front of the circular conductor and looks at the flow of electric current in a clockwise direction, it is a south pole.
- If the same observer stands behind the same circular conductor and sees the flow of electric current in the anticlockwise direction, it is a north pole.
The magnetic effect in the solenoid
The shape of the magnetic field in the solenoid
- If the observer stands in front of the solenoid and looks at the flow of electric current in a clockwise direction, it is a south pole.
- If the same observer stands behind the same solenoid and sees the flow of electric current in the anticlockwise direction, it is a north pole.
overview
Magnetic field line & their properties
- Magnetic field lines are closed and continuous curves travel from the north pole to the south pole.
- The magnetic field lines come closer to one another but never intersect with each other.
- The tangent line provides the direction of the magnetic field direction at a given point to the magnetic field lines.
- The strength of the magnetic field is determined by the number of magnetic field lines.
Application of magnetic effect of current-carrying wire
Some of the applications are,- Electric bell
- Crane lifting
- iron junk
- MRI Machine
- Maglev train
- Electric bell
- Crane lifting
- iron junk
- MRI Machine
- Maglev train
Thanks For Sharing Such an informatove post, Good work and great Stuff. Access us to know more about Magnets.
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