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Why a current wire deflects a magnetic needle placed near it?
A current wire deflects a magnetic needle placed near it because the current wire is creating an electric field. If the current is supplied from an AC (alternating current source as opposed to DC which is direct current- AC would be from a wall socket, DC from a battery), then the current is constantly changing, so the electric field is constantly changing. A changing electric field results in a magnetic field perpendicular (90 degrees) to it. It is actually the magnetic field that is changing the needle direction, because that needle is trying to follow the magnetic field lines (similar to those that you see when you put iron filing near a magnet).
What surrounds an electrified wire?
An electric field is created around an electrified wire due to the movement of electric charges. This electric field can interact with nearby objects and charges, influencing their behavior. Additionally, a magnetic field is produced around the wire, in accordance with Ampère's law.
Does electric motors change mechanical energy to magnetic energy?
Electrical energy in the form of electric current passing in the vicinity of magnetic field would create a mechanical rotation in the coil. So conversion of electrical into magnetic energy. Magnetic interaction brings out mechanical energy
Why is it a bad idea to put an electric watch too close to a strong magnetic field?
Putting an electric watch too close to a strong magnetic field can disrupt the delicate magnetic components inside the watch, affecting its accuracy and functionality. The magnetic field can interfere with the movement of the hands and inner mechanisms, leading to inaccurate timekeeping or complete failure of the watch. It's best to keep electric watches away from strong magnetic fields to ensure their proper functioning.
How are Electromagnets used in magnetic locks?
Electromagnets are used in magnetic locks by creating a magnetic field when an electric current passes through them, allowing the lock to either attract or release a metal component to secure or unlock a door. When the current is applied, the electromagnetic force is strong enough to hold the metal component tightly, providing secure locking mechanism.
How do you show that electric current causes magnetism?
Put a wire carrying an electric current near a compass and it causes the needle to deflect.
Who discovered that it is possible to alter a magnetic reading using an electric current?
thanks for the important infos u put here. God bless you
Why a current wire deflects a magnetic needle placed near it?
A current wire deflects a magnetic needle placed near it because the current wire is creating an electric field. If the current is supplied from an AC (alternating current source as opposed to DC which is direct current- AC would be from a wall socket, DC from a battery), then the current is constantly changing, so the electric field is constantly changing. A changing electric field results in a magnetic field perpendicular (90 degrees) to it. It is actually the magnetic field that is changing the needle direction, because that needle is trying to follow the magnetic field lines (similar to those that you see when you put iron filing near a magnet).
Is an electromagnet always magnetic?
No. Only when an electric charge is put through the electromagnet.
Who discovered electromagnetic force?
Hans Orsted first discovered that when an electric current was run through a wire and put close to a compass, the needle moved toward it. Although, he had no idea what that meant. Michael Faraday, built on his work and found that when an electric current runs through a wire, a magnetic field is produced around the wire. He also found that an electric field is around a wire it produces an electric current. The direction of the current depends on which direction the field is going in. The faster you move the electric field the stronger the current.
What is thumb rule related to magnetic field and current?
THUMB RULE:If we put our one thumb in the direction of magnetic flux passes through the conductor,then the movement of the fingures denotes the direction of current flow.
What surrounds an electrified wire?
An electric field is created around an electrified wire due to the movement of electric charges. This electric field can interact with nearby objects and charges, influencing their behavior. Additionally, a magnetic field is produced around the wire, in accordance with Ampère's law.
Do the induced voltage increase in a transformer when the magnetic field strength increase?
Yes, the more voltage you put in the more you get out. If the transformer is a 2 - 1 ratio and you put 240 in you get 120 out and when you put 480 in you get 240 out. Magnetic field strength and voltage have a direct relationship. +++ The field strength is actually a function of current, although as you say, increasing the voltage will increase the current hence the magnetic field.
What produce by the flow of electric charge from one area to another?
When electric charge flows from one place to another, it induces a magnetic field. The direction of the magnetic field is found by the right hand rule. To use the right hand rule, put your right hand into a fist with your thumb pointed up. When your point your thumb in the direction of the current, and the direction your fingers gives you the direction of the magnetic field.
What is a car gernerator and what does it do?
When you put electricity (current) down a wire, the wire will have a magnetic field around it. Conversely, if you move a wire through a magnetic field, a small current (electricity) is created in the wire. The more wires you use and/or the greater the strength of the magnetic field, the greater the effect becomes. These two inverse principles are the basis for electric motors, generators, alternators, and even things like the solenoid inside of a relay. If you have one item (movement or electricity), you can convert it into the other. Also tied in here is the fact that magnets repel and attract each other - that's part of how you make an electric motor move. You can use more turns of wire (windings) to generate a stronger effect. This is a simple explanation. Cars today use Alternators and no longer use Generators. The Alternator keeps the battery charged.
Does electric motors change mechanical energy to magnetic energy?
Electrical energy in the form of electric current passing in the vicinity of magnetic field would create a mechanical rotation in the coil. So conversion of electrical into magnetic energy. Magnetic interaction brings out mechanical energy
Why is it a bad idea to put an electric watch too close to a strong magnetic field?
Putting an electric watch too close to a strong magnetic field can disrupt the delicate magnetic components inside the watch, affecting its accuracy and functionality. The magnetic field can interfere with the movement of the hands and inner mechanisms, leading to inaccurate timekeeping or complete failure of the watch. It's best to keep electric watches away from strong magnetic fields to ensure their proper functioning.
