The magnetic field or energy associated with the magnetic field will no longer be generated if the current is turned off.
conclusion of electric current
The polarity of the electromagnet reverses.
When you remove the power source from an electromagnet, the magnetic field that was being generated by the flow of electric current through the coils of the electromagnet dissipates. As a result, the electromagnet loses its magnetic properties and no longer attracts or repels magnetic materials.
Electric current will be induced in such a way that the flux of the magnetic field will be constant and thereby the induced current will create magnetic field in the same direction. This is what we call Lenz's law(law of conservation of energy).
It is just one of the properties of matter that when an electric current passes through a conductor a magnetic field is formed around the conductor. Why this happens I don't think anyone knows.
The direction of the magnetic field around the electric current also reverses when the direction of the current is reversed. This is determined by the right-hand rule, where the direction of the magnetic field is perpendicular to the direction of the current flow.
Magnetic field
You generate a (stronger) magnetic field.
When electric current passes through a spring, the spring can become magnetized. The magnetic field generated by the current induces a magnetic field in the spring, causing it to act like a magnet. This magnetic property can be harnessed in various applications, such as in electromagnets or speakers.
As the electric current changes in an electromagnet, the strength of the magnetic field also changes. An increase in current strength leads to a stronger magnetic field, while a decrease in current strength results in a weaker magnetic field. This ability to control the magnetic field strength makes electromagnets versatile in various applications.
When an electric current passes through a wire, the flow of electrons creates a magnetic field around the wire. This phenomenon is known as electromagnetism. The strength of the magnetic field is directly proportional to the amount of current flowing through the wire.
When electric current passes through a coil of wire, a magnetic field is generated around the coil. This phenomenon is known as electromagnetic induction. The strength of the magnetic field is directly proportional to the amount of current flowing through the coil.
Placing a compass under a current-carrying wire can cause the needle to deflect due to the magnetic field produced by the electric current. This phenomenon, known as the right-hand rule, demonstrates the relationship between electric current and magnetic fields.
Either the bulb will start glowing or the magnetic needle will show deflection
The needle of a compass will deflect from its original position when a wire carrying an electric current is placed across it. This is due to the magnetic field created by the current in the wire, which interacts with the magnetic field of the compass needle, causing it to move.
When a current-carrying wire is placed in a magnetic field, a force is exerted on the wire due to the interaction between the magnetic field and the electric current. This force causes the wire to move or experience a deflection, depending on the orientation of the wire and the magnetic field.
When the electric current is reversed on an electromagnet, the direction of the magnetic field is also reversed. This means that the north and south poles of the electromagnet switch places. This change in polarity can have various effects depending on the application, such as reversing the direction of motion in a motor or changing the direction of attraction or repulsion in a magnetic system.