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What is the definition of commutator?
A commutator is an electrical switch that periodically reverses the current direction in an electric motor or electrical generator. A commutator is a common feature of direct current rotating machines.
Why is excitation necessary for synchronous generators?
generators work by rotating a magnetic field thru a wire shell or by rotating wire thru a stationary magnetic field (think of a small DC motor with magnets around the shell) since large generators dont have magnets in them (its not very efficent)you have to send a flowing current thru the rotating coils to produce the magnetic field. this induces current in the stator and you have a generator..of course the same effect is produced by inducing a current in the stator and pulling the output from the rotor.
Why does a compass react when near an electrical circuit?
Hi, when a current flows through a conductor a magnetic field is set up around it, it is this magnetic field or flux that attracts your compass. This of course has practical applications such as motors or generators using tight coils of wire which when a current is passed through sets up magnetic fields, in the form of a generator these lines of flux are turned and passed to stationary coils, in a motor these fields are rotated causing the yolk or rotor to chase the rotating magnetic field giving us circular motion.
Application of electrical circuit analogies in magnetic circuit?
Magnetic circuit follows equation (4) that is Ni = (Ф) ( l / μA) or m.m.f(magneto motive force) = (Flux) (reluctance).Electric circuit follows ohm's law that is E = I.R or e.m.f(electro motive force) = (current) (Resistance)From above point m.m.f in magnetic circuit is like as e.m.f in electrical circuit.Flux in magnetic circuit is similar as current in electrical circuit.Reluctance in magnetic circuit, S = ( l / μA) is similar to resistance R = (ρl/A) in electric circuit.Permeance (= 1/reluctance) in magnetic circuit is equivalent to conductance (=1/resistance) in electric circuit.In magnetic circuit flux establishes but not flow like as current in magnetic circuit.In magnetic circuit energy needed only to establish the flux but no consistent energy need to maintain it whereas in electric circuit continuous energy needed to flow of current.Resistance of an electric circuit is constant (for same temperature) and is independent of current but reluctance of magnetic circuit is not constant because it depends on μ (=B/H) which is not constant and depends on B/H.
How does an electric generator generate an electric current The generator?
The rotor turns (rotates) causing magnetic fields to move across a coil of wire. This induces an electrical current in the wires of the coil.
What are things that all electrical motors use to make motion?
All electrical motors use a magnetic field and electric current to generate motion. The interaction between the magnetic field and the current generates a force that causes the motor to rotate. Additionally, motors typically have a rotor and a stator, where the rotor is the rotating part and the stator is the stationary part.
What device works by rotating a wire coil within a magnetic field to produce current?
inductor
What device works by rotating a wire coil withing a magnetic field to produce electric current?
An electric generator works by rotating a wire coil within a magnetic field to produce electric current through electromagnetic induction. This process converts mechanical energy into electrical energy.
Which device works by rotating a coil within a magnetic field to produce an electric current?
An electric generator works by rotating a coil of wire within a magnetic field to produce an electric current through electromagnetic induction. This process converts mechanical energy into electrical energy.
What are rotating electromagnets?
Rotating electromagnets are electromagnetic devices that produce a rotating magnetic field when an electric current passes through them. They are commonly used in electric motors and generators to convert electrical energy into mechanical energy or vice versa. The rotating magnetic field creates a torque that drives the rotation of the motor's rotor or generator's armature.
Where is the magnetic field created alternator?
The magnetic field in an alternator is created by the rotor, which is an electromagnet that produces a rotating magnetic field as it spins. This magnetic field induces an alternating current in the stator windings through electromagnetic induction, which is then converted to usable electrical power.
Which device works by rotating awire coil within a magnetic field to produce electric?
An electric generator works by rotating a wire coil within a magnetic field to produce electricity. This rotation induces a current in the wire coil, which can then be harnessed and used to power electrical devices.
How does a generator create current and what is the process involved?
A generator creates current by converting mechanical energy into electrical energy through electromagnetic induction. This process involves a coil of wire rotating within a magnetic field, which induces a flow of electrons, resulting in the generation of electrical current.
How does a generator produce a alternating current?
Electro-magnetic induction . a rotating force-field, so to speak. sounds very sci-Fi but a basic electrical device.
How is produce current?
Current is created when electrical charges move through a wire or other conductor. It can be produced by rotating magnetic fields (as in a generator) or by connecting a source of higher electrical potential (charge) to one of lower electrical potential, which can cause the movement of charges from one point to another.
Electrical current produced by water flowing through a turbine?
The electrical current produced by water flowing through a turbine is generated through electromagnetic induction. As the water flows through the turbine and causes it to rotate, the rotating turbine interacts with a magnetic field, inducing an electrical current in the surrounding wires. This current can then be harnessed and converted into usable electricity.
What is an electrical current that produces a magnetic field?
The deflection of a magnetic compass in the presence of an electric current, is evidence that an electric current produces a magnetic field.
