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How is the induced surface charge affected by external electric fields?
The induced surface charge is influenced by external electric fields. When an external electric field is applied, it can attract or repel charges on the surface, causing the distribution of charges to change. This can result in an increase or decrease in the induced surface charge depending on the direction and strength of the external electric field.
What is the direction of the induced current in a loop when there is a change in magnetic field direction?
When there is a change in the direction of the magnetic field in a loop, an induced current is generated in the loop in a direction that opposes the change in the magnetic field.
Why does the electric field inside a dielectric decrease when it is placed in an external electric field?
The net electric field inside a dielectric decreases due to polarization. The external electric field polarizes the dielectric and an electric field is produced due to this polarization. This internal electric field will be opposite to the external electric field and therefore the net electric field inside the dielectric will be less.
How can one determine the direction of induced current in a circuit?
The direction of induced current in a circuit can be determined using Lenz's Law, which states that the induced current will flow in a direction that opposes the change in magnetic field that caused it. This means that the direction of the induced current will be such that it creates a magnetic field that opposes the original change in magnetic field.
What is induced electric field?
An induced electric field is a field that is created in a region in response to a changing magnetic field. According to Faraday's law of electromagnetic induction, a changing magnetic field induces an electric field in the surrounding space. This phenomenon is the basis for the operation of devices such as generators and transformers.
How is the induced surface charge affected by external electric fields?
The induced surface charge is influenced by external electric fields. When an external electric field is applied, it can attract or repel charges on the surface, causing the distribution of charges to change. This can result in an increase or decrease in the induced surface charge depending on the direction and strength of the external electric field.
What is the direction of the induced current in a loop when there is a change in magnetic field direction?
When there is a change in the direction of the magnetic field in a loop, an induced current is generated in the loop in a direction that opposes the change in the magnetic field.
Why does the electric field inside a dielectric decrease when it is placed in an external electric field?
The net electric field inside a dielectric decreases due to polarization. The external electric field polarizes the dielectric and an electric field is produced due to this polarization. This internal electric field will be opposite to the external electric field and therefore the net electric field inside the dielectric will be less.
What is induced by an electric field that changes with time?
A magnetic field
How can one determine the direction of induced current in a circuit?
The direction of induced current in a circuit can be determined using Lenz's Law, which states that the induced current will flow in a direction that opposes the change in magnetic field that caused it. This means that the direction of the induced current will be such that it creates a magnetic field that opposes the original change in magnetic field.
The direction of the electric field vector is defined as?
Direction of the electric field vector is the direction of the force experienced by a charged particle in an external electric field.
Why are both negative and positive voltages generated as the magnet passes through the coil?
In this context, 'negative' and 'positive' are used to indicate the sense, or direction, of the induced voltages, as voltages do not have electric polarity (+ or -). The direction of the voltage induced into a conductor is determined by the direction of that conductor relative to the magnetic field. As the coil rotates, the directions of each side of the coil reverse relative to the field, and the induced voltages reverse too.
What is induced electric field?
An induced electric field is a field that is created in a region in response to a changing magnetic field. According to Faraday's law of electromagnetic induction, a changing magnetic field induces an electric field in the surrounding space. This phenomenon is the basis for the operation of devices such as generators and transformers.
How can one determine the direction of the electric field?
To determine the direction of the electric field, you can use a positive test charge. The direction of the electric field is the direction in which a positive test charge would move if placed in that field.
Does an electric field have strength but no direction?
It has plenty of direction. The direction of the electric field at any point in it is the direction of the force that would be felt by an infinitesimally small positive charge placed at that point.
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 is the direction of induced current in lenzs law?
According to Lenz's Law, the direction of the induced current is such that it opposes the change in magnetic flux that produced it. If the magnetic field through a loop is increasing, the induced current will flow in a direction that creates a magnetic field opposing that increase. Conversely, if the magnetic field is decreasing, the induced current will flow in a direction that attempts to maintain the original magnetic field. This principle ensures the conservation of energy in electromagnetic systems.
