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What are the differences between electromagnetic attraction relay and electromagnetic induction relay?
Electromagnetic attraction relays have a fixed contact and a moving contact, attached normally to either a hinged plate, or the moving piston of a solenoid. The contacts are brought together by the magnetic attraction of an energized coil attached to one of the contact supports, or in the case of the solenoid, the coil which surrounds the moving piston. These relays can operate on either ac or dc inputs, and have virtually no time delay. This makes them ideal for instantaneous operations.
Electromagnetic induction relays operate on the principle of the induction motor - that is, magnetic flux applied to a rotor will develop torque in that rotor, and cause it to rotate. However, instead of spinning like a motor, the rotor in this type of relay has a mechanical stop or reset point, and a contact fixed to it that will eventually touch the stationary contact, when the input quantity meets or exceeds the predetermined setpoint. Relays of this type only operate with ac quantities, and, in many or most cases, can be adjusted to provide a time delay (which in reality simply moves the reset point farther away from the contact point, so that the rotor must rotate farther to pick up the contacts).
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What produces an electromotive force through relative motion between a conductor and a magnetic field?
Electromagnetic Induction.
State faradays law of electromagnetic induction?
It is defined as when the conductor is placed between the magnetic field and since when the conductor cuts the path of the magnetic field emf is produced... The basic Faraday's Law of electromagnetic induction...
Why is an induction motor called rotating transformer?
A motor rotor rotates due to an interaction between magnetic fields of the rotor and stator, where either may use permanent magnets, electromagnets, or a combination of both to effect the interaction. This interaction is based on the principle of opposite attraction and like repulsion related to magnets. Either the rotor or stator creates an electromagnetic field, and the opposite component (rotor or stator) tries to attract and repel the appropriate magnetic poles to 'lock' position with the electromagnetic field. The magnetic field is 'rotated' electrically by applying voltage to different windings within the motor in sequence, and since the moving component always tries to lock position with the magnetic field, the rotor will constantly rotate while trying to align its magnetism.
Difference between inductance and inductive reactance?
The opposition to AC current flow in a circuit due to induction is called inductive reactance.The process of generating electrical current in a conductor by placing the conductor in a changing magnetic field is induction or just induction.
What is induction type relay?
An induction relay works only with alternating current. It consists of an electromagnetic system which operates on a moving conductor, generally in the form of a disc or cup, and functions through the interaction of electromagnetic fluxes with the parasitic Fault currents which are induced in the rotor by these fluxes. These two fluxes, which are mutually displaced both in angle and in position, produce a torque that can be expressed by T= Κ1.Φ1.Φ2 .sin θ, Where Φ1 and Φ2 are the interacting fluxes and θ is the phase angle between Φ1 and Φ2. It should be noted that the torque is a maximum when the fluxes are out of phase by 90º, and zero when they are in phase.
What is A force of attraction between two even if they are not touching?
It could be electromagnetic attraction (or repulsion).
What is a force of attraction between two objects even if they are not touching?
It could be electromagnetic attraction (or repulsion).
What is the difference between an electromagnetic rotation and electromagnetic induction?
Electromagnetic rotation refers to the physical rotation of an object due to the interaction of magnetic fields. Electromagnetic induction, on the other hand, is the process where a changing magnetic field induces an electromotive force or voltage in a conductor, causing current to flow. In summary, electromagnetic rotation involves mechanical movement, while electromagnetic induction involves the generation of an electrical current.
What are lines of force cut by when they are electromagnetic induction?
The line of force or Flux between a north and south pole of a magnet are cut by rotating conductors. This induces a voltage into the conductors. This is referred to as electromagnetic induction.
Which is basic function of transformer?
It uses electromagnetic induction to transfer energy between separate circuits.
What is the Forces of attraction between objects?
Gravitational force.
What produces an electromotive force through relative motion between a conductor and a magnetic field?
Electromagnetic Induction.
A device that can transmit electrical energy between two non-connected coils of wire by electromagnetic induction is called?
A transformer
What of the four fundamental forces is an attraction between opposite charges?
Electrostatic force — APEX
What form of energy is used in the energy transfer between the 2 coils?
Electromagnetic energy in the form of electromagnetic fields is used in the energy transfer between two coils in an electromagnetic induction process, where changing magnetic fields induce a current in the second coil.
What is induction pump?
Induction pump is a term used to describe any type of pump that depends on electromagnetic induction for its operation. These pumps are often used for liquid alkaline metals that are expected to reach temperatures between 800 and 1000 degrees Celsius.
How does the force of attraction decrease?
The force of attraction between two objects decreases as the distance between them increases. This is because gravitational or electromagnetic forces, which are responsible for attraction, diminish with distance. The inverse square law states that the force decreases exponentially as the distance between objects increases.
