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How the number of turn in the coil affects the induces current?
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Why the induced EMF is negative when the voltage in the first coil increasing?
It's an increasing current, not voltage, that induces an e.m.f. into a coil. The reason that the induced e.m.f. opposes the increasing current is all to do with the Law of the Conservation of Energy.
What is the difference between current coil and voltage coil?
These terms apply to the coils inside a wattmeter. 'Pressure coil' is an archaic term for 'voltage coil', which is connected in parallel with the supply, while the 'current coil' is connected in series with the load.
When a strong magnet is passed rapidly through a coil of wire what is true?
The magnetic field lines (the lines of force) around the magnet sweep the windings in the coil. This induces a voltage in the windings (through induction), and the voltage will try to drive current if it can. There is a bit more to this, but the essential elements are that the magentic lines of force cause voltage in the coil because there is relative motion between the field and the coil.
What is electrical excitability?
I think you mean 'excitation'; this refers to the process by which a current sets up a magnetic field which, in turn, induces a voltage into a conductor or coil -usually applied to transformers, motors, and generators.
How Electric power is transformed upon one coil to other coil in a transformer?
One coil builds up a magnetic field when it is energized (and de-energized) and this induces an electric current in the other coil. The voltage produced in the second coil is determined by the number of coils wound on it compared to the first coil. This is called the turns ratio and only works with alternating current unless you are using it with a dc battery to make a spark in an ignition coil. examples primary 100 turns, secondary 200 , is a step up transformer ie from 10 volts AC to 20 volts AC 100 turns primary, 50 turns secondary, step down transformer ie from 10 volts AC to 5 volts AC
Does a generator produce electric current?
A generator moves a coil of wire through a magnetic field and that induces a current in the coil .
How does a generator produce electric current?
A generator moves a coil of wire through a magnetic field and that induces a current in the coil .
What affects how strong an electromagnet is?
The number of turns in the coil of wire, the electrical current flowing through the coil, and the presence of an iron core inside the coil.
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.
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.
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 does a inductive ammeter do?
It measures current by creating a coil around the current carrying wire. Current flowing in the wire induces a current in the amp-meter proportional to the current flowing in the wire.
Is flow of induced current necessary when induces emf is being produced?
There is no such thing as an 'induced current'. Voltages are induced, not currents. If a voltage is self-induced into a coil, then that voltage will oppose any change in current. If a voltage is mutually-induced into a separate coil, no current will flow unless that coil is connected to a load.
Why there is an induced current in a coil when a bar magnet is thrust out of the coil?
The magnetic lines of force surrounding the bar magnet, cut through the coils of wire, causing electrons to move. This induces an electric current. It is the movement that is important, whether moving into, or out of, the coil.
How Do's power transformer from one side to other of a transformer?
A transformer has two coils wound on an iron core which is there to support a magnetic field. A alternating voltage applied to one coil, called the primary, induces a magnetic field in the core. That field induces a back-emf in the primary coil, and also it induces an emf in the other coil, called the secondary. If a load current is taken from the secondary the current causes a reduction in the magnetic field, which is compensated by more current flowing in the primary. That is how power is transferred.
Why the induced EMF is negative when the voltage in the first coil increasing?
It's an increasing current, not voltage, that induces an e.m.f. into a coil. The reason that the induced e.m.f. opposes the increasing current is all to do with the Law of the Conservation of Energy.
How does a resonant frequency with which wire vibrates induces the alternating current in the coil magnet?
frequency does not make wires vibrate at resonance the impedance is at its highest point
