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Have you ever seen a magnet, Of course ! Yes But do you know how its work and why it is use in most of technical machines
From my point of view everything Which looks simple, Behind it a great scientific phenomenon is work .
In this particular blog we will learn about the Magnetic effect of electric current 2020 and Working of magnets and its properties.
According to class 10th cbse pattern .
Here is topics Which are included are as follow :-
Firstly, we will know about, What is magnet ? with their properties. ✔
Secondly , we learn about what is exactly a magnetic field and uses of magnets in various purpose. ✔
Thirdly, Properties of magnetic field and rules including in class 10th magnetic effect of electric current 2020 by famous scientists ✔
Finally, we will discuss about Electromagnets .
So you guys really exited to know so lets begin :-
What is Magnetic Effect of electric current ? What is magnets
Before the getting knowledge about Magnetic effect of electric current 2020. Firstly, we should know about What is Magnets and its properties
What is magnets :- Magnets are an object made up of rock or iron and have field around it ,which is attract certain kind of materials such as iron , cobalt & nickel.
Magnets having two poles commonly known as south – north poles , opposite poles attract each other and negative poles repel.
Extra points :- Lodestone is a metal which have naturally occur magnetic properties ,Properties of magnetic field is firstly discovered in lodestone.
Strong magnets are neodymium magnets , Flexible and rubber magnets are weak magnets .
Three types of Properties of Magnets we should know :-
Attractive properties :- All magnets attracts the certain kinds of metal, if any metal comes into the range of magnetic field produce by a magnet its attracts.
Magnets attract the ferromagnetic materials like iron, cobalt, etc.
Repulsive properties :- Magnets have like and unlike poles , like magnets poles repel each other and unlike poles attract each other.
Directive properties :- A freely move magnet always point to the north direction.
Use of magnets :-
Magnets are really useful for us However, Magnets use in some of home appliances we used in our daily life as follow :-
In refrigerators , speaker , cassettes , headphones , earphones , toys , hard disk floppies etc
Directive properties of magnets used to make a Device called compass , Compass have a needle tip of needle made up with magnets always point to north direction.
Extra point :- Magnetars is Strongest magnet of universe form after supernova explosion.
What is Magnetic field ? What is magnetic field lines ?
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there are many topics in chapter Magnetic effect of electric current
Magnetic field :- A area covered by a magnet where we feel magnetic effects and any ferromagnetic material come into this area its attract,
This area is a field created by a magnet known as magnetic field.
Magnetic field lines :- Magnetic field lines is a imaginary line which indicate the magnetic field of a magnets.It is a pattern visible when we put iron filling in a magnet.
It is also detect by compass . Magnetic field have direction and magnitude
We can define field lines in two ways the direction of field lines and strength of field lines :-
How can we define the direction of field lines ?
The direction of field lines in outside of magnets always goes North pole to South pole , and
the direction of field lines in inside of magnets always goes South pole to North pole.
Therefore, How can we define the strength of field lines ?
In this case, we see how close the magnetic lines to the magnets , because it is show the relation of strength
i.e the closeness of lines show the higher force of magnets and far lines show the lower force of magnets
Properties of magnetic field :-
The properties of magnetic field as follow :-
Firstly, Magnetic lines do not intersect with each other
Secondly, Magnetic lines emerge from north pole of magnet to merge at south pole of magnet.
Therefore, Magnetic field line form a close curve
Magnetic field lines form due to carrying current in straight conductor
Magnetic field lines form by straight conductor is like a concentric circle, The direction of field lines is depend on direction of flow on electric current.
when the electric current carrying conductor suspended vertically and the current flowing south to north.
In this case the direction of magnetic field is anti clockwise ,
Similarly, If the current flowing from north to south , the direction will be clockwise .
The direction of magnetic field in relation of current carrying straight conductor can be define by right hand thumb rule;
Extra point :- The magnetic field of earth is 1000 times weaker then a bar magnets.
Right hand thumb rule :- This rule indicate that when we put current carrying conductor by our right hand , and keeping our thumb straight,
If the direction of electric current is same as direction of thumb , the direction of magnetic field line will be the direction of wrapping finger.
Maxwell’s Corkscrew rule :- This rule indicate that when we put a screw and movement of screw is forward direction it shows the direction of current and rotating direction is called direction of field.
Properties of magnetic line during current carrying straight conductors
The magnitude of field lines is direct proportionate to electric current ,In case the electric current increase magnitude is increase.
The magnitude of field lines is inversely proportionate to its distance , In case the direction is decrease the magnitude is increase.
Magnetic field lines is always parallel to each other.
Lines do not intersect each other.
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Magnetic field lines during current carrying through a circular loop
So dear student , we studied about the magnetic field lines and magnetic field lines during current carrying straight conductor now time to learn.
How magnetic field lines will be form after carrying current in circular loop , If you think its difficult ?
Obviously No ! Magnetic field lines form by circular loop is same as straight conductor
The closest Magnetic field lines from conductor is strongest and in distance the loop of magnetic field is increase, Finally the lines will straight at middle of conductor .
You can also determine the magnetic field lines by Right hand thumb rule ,
Clock Face Rule: A current carrying loop works like a disc magnet. The polarity of this magnet can be easily understood with the help of Clock Face Rule.
If the current is flowing in anti – clockwise direction, then the face of the loop shows north pole. On the other hand, if the current is flowing in clockwise direction, then the face of the loop shows south pole.
The strength of magnetic field at the center of loop is depend on :-
The radius of coil :- Strength of magnetic field is inversely proportional to the radius of the coil. Radius is increase the magnetic strength at the center decreases.
The number of turns in the coil :- As the number of turns in the coil increase, the magnetic strength at the center increase. because the current in each circular turn is having the same direction , thus the field due to each turn adds up.
Strength of current flow :- The strength of current is increase , magnetic field also increase.
Magnetic field during solenoid :-
What is solenoid :- Solenoid is a tool or coil with many turns of insulated copper wire wrapped in the shape of a cylinder.
A solenoid with carrying current produce same magnetic field lines as a bar magnet produce.They have two poles north and south pole like a bar magnet.
Properties of magnetic field lines of solenoid :-
Inside the solenoid magnetic field lines is parallel to each other.
The strength of magnetic field is depend on number of coils turn in solenoid it is directly proportionate to it.
we can make a magnet using a magnetic material put inside it , during the strong magnetic field it convert into magnet called as electromagnet.
Electromagnet :- An electromagnet consist of a long coil insulated copper wire wrapped on a soft iron core.
Fleming’s Left hand thumb rule :- The direction of electric current perpendicular to the direction of magnetic force
The Fleming’s Left Hand Rule states that if the left hand is stretched in a way that the index finger,
The middle finger and the thumb are in mutually perpendicular directions,then the index finger,
and middle finger of a stretched left hand show the direction of magnetic field and direction of electric current respectively and.
the thumb shows the direction of motion or force acting on the conductor.
The directions of electric current, magnetic field and force are similar to three mutually perpendicular axes.
Electric Motor :- A device that converts electric energy to mechanical energy .
Principle of electric motor :- When a rectangular coil is placed in a magnetic field and a current passed it,
forces act on coil, which rotates it continuously , when it rotates the shaft attached with it also rotate.
Electromagnetic induction :- When electricity is produce by the magnetism is called Electromagnetic induction
Electrical generator :- A device that convert mechanical energy to electric energy.
Two type of generator :-
Generator work in Electromagnetic induction principle
We received electric supply through mains supported through the poles or cables,
In our house we receive AC power of 220 V with frequency of 50 Hz
3 wires :-
Live wire – Red insulated wire positive
Neutral wire – Black insulated wire negative
Earth wire – Green insulated
Short circuit :- when live wire and neutral wire is touching they will short circuit.
Fuse :- It is a protective device used to prevent short circuiting and over loading
So now we ended the chapter Magnetic effect of electric current 2020
I hope you guys understand the concept of topic
Stay blessed Stay enjoy .