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Which law gives the direction of induced current?
LENZ LAW gives the direction of induced current.
What are the reasons why a current is induced in a coil?
Current is not induced into a coil. It's voltage that is induced into a coil. If the coil is connected to a load, or even short circuited, then a current will flow as a result of the induced voltage -but it's the voltage, not the resulting current, that's induced!Voltage is induced into a coil because the the changing magnetic field, due to the change in current (0 to Imax or vice versa) applied to that coil. The process is called 'self induction'.
Define the term induced current?
a current can be induced by changing the area of a coil in a constant magnetic field. By Faraday's Law: the induced current is proportional to the rate of the change of flux in a loop of wire. With magnetic flux being defined as the product of the magnitude of the magnetic field and the area of the loop. The direction of the current is found from Len's Law: The induced current produces an induced magnetic field that opposes the change of flux causing the current.CommentYou don't induce a current, you induce a voltage. And Faraday's Law states that the induced voltage, not current, is proportional to the rate of change of flux! If the coil is open circuited, a voltage is still induced into the coil but no current will flow. For current to flow, the coil must be connected to a load (or short circuited), and this current is dependent upon the values of the induced voltage and the resistance of the load.
What are the cause of induced emf?
A change in current causes a voltage to be induced into an inductive circuit, which opposes that change of current. This is because the change in current is accompanied by a change in magnetic flux which 'cuts' the conductors and induces a voltage into them.
In a transformer what induces a current in the secondary coil?
The current flowing in the primary generates a magnetic field which induces a current in the secondary winding.AnswerNo current is induced into the secondary winding of a transformer. What is induced is voltage. Current will only flow in the secondary winding if it is connected to the load, and it is the load that determines the current, not the primary current.
What would not affect the strength of an induced current?
The strength of an induced current is not affected by the resistance of the circuit it flows through. The factors that affect the strength of an induced current are the rate of change of magnetic flux, the number of loops in the coil, and the material of the coil.
How is induced current in a wire generated and what factors influence its strength?
Induced current in a wire is generated when there is a change in magnetic field around the wire. Factors that influence the strength of the induced current include the rate of change of the magnetic field, the number of turns in the wire, and the material of the wire.
How is the induced voltage of separately excited dc generator affected if the exciting current is reduced?
In a separately excited DC generator, the induced voltage is directly related to the magnetic field strength produced by the field winding, which is influenced by the exciting current. If the exciting current is reduced, the magnetic field strength decreases, leading to a reduction in the induced voltage. Consequently, the output voltage of the generator will decrease as the field strength diminishes, assuming all other factors remain constant.
What factors determine the magnitude of induced current in a wire loop when exposed to a changing magnetic field?
The magnitude of induced current in a wire loop when exposed to a changing magnetic field is determined by factors such as the strength of the magnetic field, the rate of change of the magnetic field, the number of turns in the wire loop, and the resistance of the wire.
How does the strength of the magnet affect the current induced?
The strength of the magnet and its proximity effect the current produced. The magnetic flux density falls quickly so it is important to get close. The stronger the magnet the more lines of flux that pass a point as it moves. Or as something passes by it.
What is the factors on which the induced EMF in a coil rotating in a uniform magnetic field depends?
The induced EMF in a coil rotating in a uniform magnetic field depends on the strength of the magnetic field, the number of turns in the coil, the area of the coil, the speed of rotation, and the angle between the magnetic field and the plane of the coil.
How is induced current in a loop affected by changes in magnetic field strength?
The induced current in a loop is directly affected by changes in magnetic field strength. When the magnetic field strength increases or decreases, it causes a change in the magnetic flux passing through the loop, which in turn induces an electric current in the loop according to Faraday's law of electromagnetic induction.
What factors determine the voltage induced in a wire?
V = I * R or I = ( V / R ) I = current (amps) V = Voltage R = Resistance The current in a circuit depends on the applied voltage and the resistance of the circuit.
What determines whether an induced current is a direct current or an alternating current?
There is no such thing as an 'induced current'. What is 'induced' is a voltage. The direction of the induced voltage is determined by the direction of the changing current that induces that voltage, because the induced voltage will always act to oppose that change in current. So, if the current is increasing, then the direction of the induced voltage will act to opposethe increase in current. If the current is decreasing, then the direction of the induced voltage will act to sustainthat current.
What are the factors that determine the amount of induced current?
The factors that determine the amount of induced current in a coil include the rate of change of magnetic flux through the coil, the number of turns in the coil, and the resistance of the coil. Faraday's law states that the induced electromotive force (emf) is directly proportional to the rate of change of magnetic flux.
What happens when a coil is rotated between two magnets?
When a coil is rotated between two magnets, an electric current is induced in the coil due to the changing magnetic field. This phenomenon is known as electromagnetic induction and is the basic principle behind generators and electric motors. The amount of current induced depends on the speed of rotation and the strength of the magnetic field.
What is the SI unit of induced current?
The SI unit of induced current is the ampere (A).
