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Why is the magnetic field produced by a cylindrical solenoid is similar to a cylindrical permanent magnet?
Simple Answer:
The shape of the magnetic field of a uniformly wound solenoid is very nearly identical to the field produced by a uniformly magnetized permanent magnet with the same physical shape as the solenoid.
For the Experts:
This is a consequence of the mathematical equivalence of the source of the magnetic field as created by a current and the source of a magnetic field as created by the curl of the magnetization density of permanent magnet.
What else can I help you with?
Why is a iron bar placed in a solenoid?
An iron bar is placed in a solenoid to increase the magnetic field strength produced by the solenoid. The iron bar becomes magnetized by the solenoid's magnetic field, enhancing the overall magnetic effect. This is commonly used in devices like electromagnets to amplify their magnetic strength.
A current carrying solenoid tends ot contract why?
A current-carrying solenoid contracts due to the magnetic fields created by the current. The interaction between the magnetic field produced by the current and the magnetic field within the solenoid causes a net force on the solenoid itself, resulting in contraction. This phenomenon is described by the Lorentz force law.
Why B outstide a solenoid is non-zero?
The magnetic field outside a solenoid is non-zero because magnetic field lines emanate from the ends of the solenoid, creating a magnetic field in the surrounding space. This external magnetic field is due to leakage of the magnetic field from the solenoid as well as fringing effects at the edges of the solenoid.
How magnetic field lines look in hollow cylindrical electromagnet?
Inside the hollow cylindrical electromagnet ("solenoid"), the magnetic field lines are straight, parallel to each other, and parallel to the axis of the cylinder. They get more complicated at the ends, but the above statement is good for a solenoid of infinite length, which has no ends, and is a good approximation in the center of a real one.
Why magnetic field outside the solenoid is zero?
The magnetic field outside a solenoid is nearly zero due to the cancellation of magnetic fields generated by individual current-carrying loops within the solenoid. These loops produce magnetic fields that point in opposite directions, resulting in a net magnetic field of zero outside the solenoid. Additionally, the magnetic field lines tend to stay within the solenoid due to the high permeability of the material surrounding the coils, further reducing the magnetic field outside the solenoid to negligible levels.
What shape of a permanent magnet corresponds to the magnetic field formed by a solenoid?
A solenoid typically produces a magnetic field similar to that of a bar magnet. The magnetic field lines form loops around the solenoid, making it closely resemble a bar magnet with north and south poles at either end.
What is a wire wrapped into a cylindrical coil?
A wire wrapped into a cylindrical coil is referred to as a solenoid. Solenoids are used in electromagnets, inductors, and various types of electronic components to generate a magnetic field when current passes through the wire. The shape of the coil allows for a concentrated and uniform magnetic field to be produced.
How do you produce a uniform magnetic field using a solenoid?
A uniform magnetic field can be produced using a solenoid by ensuring the solenoid has a tightly wound coil of wire with a constant current flowing through it. The magnetic field inside the solenoid will be parallel and uniform along the central axis of the solenoid. Placing a ferromagnetic core inside the solenoid can help enhance and concentrate the magnetic field.
Why is the deflection in the galvanometer reversed when the magnet is moved in and out in a solenoid?
When the magnet is moved into the solenoid, the change in magnetic field induces an electric current in the solenoid. This induced current then creates a magnetic field that opposes the initial magnetic field created by the permanent magnet. This opposing magnetic field causes the galvanometer deflection to be reversed.
Which factors affect the magnetic strength of a solenoid which is carrying an electric current?
Factors affecting the magnetic field strength of a solenoid are: - length of the solenoid - diameter of the solenoid - current through the coil around the solenoid - number of turns of the coil of current around the solenoid, usually turns of wire - material in the core
Why soloniod is used for magnetize different metals?
Solenoid is a helically wound coil of wire. If current flows through the wire then an intense magnetic field is produced along the axis of the solenoid. This magnetic field would induce magnetism in the ferro magnetic piece placed along the axis of the solenoid.
How does a solenoid act as a magnet?
When current is passed through a solenoid coil, magnetic field produced due to each turn of solenoid coil is in the same direction. As a result the resultant magnetic field is very strong and uniform. The field lines inside the solenoid are in the form of parallel straight lines along the axis of solenoid. Thus, the solenoid behaves like a bar magnet.
How an unmagnetized metal core is magnetized when it is inserted in a solenoid to make an electromagnet?
The solenoid will create a magnetic field inside the solenoid, running parallel to the length of the solenoid. This will happen with or without any metal core, when the current is running. If there is an iron metal core the solenoid's magnetic field will rotate the atoms in the iron in such a way as to reinforce the solenoid's field. The iron atoms are themselves tiny magnets oriented randomly. When alligned, the tiny magnets add to the original solenoid field to give a much stronger magnet.
When A solenoid with a core is called an electromagnet?
A solenoid with a core becomes an electromagnet when an electric current is passed through it. The magnetic field produced by the current aligns the magnetic domains in the core, increasing the strength of the magnetic field. This allows the electromagnet to attract or repel other magnetic materials.
How is a solenoid similar to a magnet?
A solenoid acts like a magnet when an electrical current is sent through the coil. A permanent magnet is magnetic all the time. Therefore, they are similar when both act like a magnet, but not when the solenoid is turned off.
What force moves the plunger when the solenoid is activated?
The magnetic field produced by the solenoid interacts with the plunger's ferromagnetic material, creating a force that moves the plunger. This force is generated due to the attraction between the opposite magnetic poles of the solenoid and the plunger.
Can a permanent magnet solenoid be modified to work like a permanent magnet linear generator?
yes - need to run electricity through it to make it a linear magnetic generator.
