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If the magnetic field is fluctuating, or the coil of wire and magnetic field are moving with respect to each other, then a current is induced in the coil of wire.
If the two are stationary and the magnetic field is stable, then no current is induced in the coil. However, if there is a current in the coil, from another source, then the coil and the field will exhibit a relative force that will tend to move the coil with respect to the field.
What else can I help you with?
What happens when the current in the coil is halved?
When the current in a coil is halved, the magnetic field strength generated by the coil is also halved, following the equation B = μ₀ * n * I, where B is the magnetic field strength, μ₀ is the permeability of free space, n is the number of turns in the coil, and I is the current. This decrease in magnetic field strength will also affect any nearby magnetic materials, potentially reducing the overall magnetic flux and induced voltage in any nearby circuits or devices. Additionally, the force experienced by the coil in a magnetic field, as described by the Lorentz force law, will also be reduced proportionally to the decrease in current.
Working principle of ammeter?
An ammeter consists of a coil with very low resistance. when electric current flows through the coil, the coil induces a magnetic field which turns the needle.
When a electro magnet flows through a coil of wire wrapped around a bar of iron it makes what?
a magnetic field
What four factors determine how much voltage is induced by a magnet?
1. The amount of current flowing through the coil 2. The number of coil turns around the core 3. The rate at which the conductor moves through the magnetic field 4. The amount of reluctance that exists inside the magnetic field
What are the three ways in which voltage can be induced in a wire?
Voltage can never be induced in a straight open wire because flux through a wire is zero but a coil made up of a wire can have induced voltage. Methods Move a magnet to and fro through the coil, the magnitude can be changed by altering the relative velocities between them Move the coil relative to he still magnet Place the coil in a time varying magnetic field such that the flux linked through the coil changes with respect to time Place the coil tn an uniform magnetic field and alter its area with respect to time
What happens when electric current passes through a coil of 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.
What happens when a current passes through a piece of coil?
When a current passes through a piece of coil, it generates a magnetic field around the coil. This magnetic field can then interact with other magnetic fields or magnetic materials nearby, leading to effects such as electromagnetic induction or attraction/repulsion of magnetic materials.
What happens to the coil when a current flows through?
When a current flows through a coil, it generates a magnetic field around the coil according to Ampere's law. This magnetic field can attract or repel other nearby magnetic materials and can induce a voltage or current in nearby conductors through electromagnetic induction.
What happens when a coil of wires moves through a magnetic field?
When a coil of wires moves through a magnetic field, an electric current is induced in the wires through electromagnetic induction. This phenomenon is known as Faraday's law of electromagnetic induction. The direction and magnitude of the induced current depend on the speed and direction of the coil's motion through the magnetic field.
What happens when a electric current is passed through a coil of wires?
You generate a (stronger) magnetic field.
How is magnetic field made radial in a moving coil galvanometer?
The magnetic field in a moving coil galvanometer is made radial by surrounding the coil with a cylindrical magnetic core. When current flows through the coil, it creates a magnetic field perpendicular to the coil. This magnetic field interacts with the radial magnetic field of the core, causing a torque on the coil that deflects the pointer.
What happens when you run electricity through a coil of wire?
Running electricity through a coil of wire will create a magnetic field around the wire. This phenomenon is known as electromagnetism. The strength of the magnetic field can be increased by increasing the current flowing through the wire or by adding more coils to the coil.
How is a current induced in a wire when a coil of wire moves through a magnetic field?
When a coil of wire moves through a magnetic field, the changing magnetic field induces a current in the wire through electromagnetic induction.
What creates the magnetic field for the electromagnet?
The magnetic field for an electromagnet is created by the flow of electric current through a coil of wire, which generates a magnetic field around the coil.
What measures current by using the deflections of a coil of wire placed in a permanent magnetic field?
A galvanometer measures current by deflecting a coil of wire in a magnetic field. The current flowing through the coil generates a magnetic field that interacts with the permanent magnetic field, causing the coil to deflect. The amount of deflection is proportional to the current strength flowing through the coil.
When current flows through a coil of wire?
When current flows through a coil of wire, a magnetic field is produced around the coil. This magnetic field can induce a voltage in nearby conductors, creating electromagnetic induction. The strength of the magnetic field is directly proportional to the amount of current flowing through the coil.
What happens to the strength of an electromagnetic field when you increase the current flowing through the coil of wire around an iron bar?
Increasing the current flowing through the coil of wire around an iron bar will increase the strength of the magnetic field produced by the electromagnet. This is because magnetic field strength is directly proportional to the current flowing through the coil.
