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How electric current have magnetic effect?
The magnetic force acts only on moving electric charges; A constant electric current produces an unchanging magnetic field and a changing electric current produces a changing magnetic field.
What does a inductor do in a circuit?
DC current has no effect on the inductor(can be considered as a short circuit) as the current does not change in a DC supply voltage this one just produces a magnetic field which remains constant , as the magnetic field is not varying no emf is induced in the circuit , so literally it has no effect on the circuit when the supply is of DC voltage.when an alternating current is set up in a circuit , the Alternating current brings a magnetic field in the inductor which is variable (since the current is varying...) this variable magnetic field induces an emf in the circuit (back emf) which opposes the cause that is producing the change (lenz's law)explanation consider a circuit with an inductor connected to an AC voltageduring the positive half cycle when the voltage increases the current also increases in the circuit [take the current direction as clockwise] this causes a variable increasing magnetic field in the inductor , this magnetic field in turn induces current in the circuit which is opposing the increase in the current flow from the original source, the inverse happen during the decreasing half of the half of the positive cycle , here the induced current adds up with the decreasing current opposing the cause that produced this back current (cause :- decrease in current changes the magnetic field so the induced current is produced ..... it is opposing the change because :- the induced current either decreases the increasing current or increases the decreasing current )
What is armature reaction in dc machines?
The armature reaction is the interaction between armature flux and field flux when current is introduced to a dc motor. It results in a cross-magnetizing effect and a demagnetizing effect.
What is the oersted effect?
This effects demonstrates the way electricity interferes with a magnetic field. A magnetic field will be changed by the passage of electric current. This is due to the orthogonal H field and E field and how they relate to each other. Important in antenna design, especially amateur radio work.
Does ac current produce magnetic field?
Yes; any current produces a magnetic field, an AC current will produce an alternating magnetic field. If the current (and therefore the magnetic field) changes quickly, you may not be able to detect it with a compass needle, for example.
When a current carrying conductor is placed into a magnetic field a voltage will be generated perpendicular to both the current and the field This effect is called?
Hall Effect
What is the effect of field current on dc motor?
The field current of a dc motor provides the magnetic field that allows the motor to develop a torque when current flows through the armature..
What effect does increasing the current have on solenoid?
it will produce a stronger magnetic field.
Why the name is FET?
FET stands for Field Effect Transistor. The name FET comes because the gate current of a field effect transistor is zero and current present in the source conductor is due to an electric field produced by the substrate material placed between the gate and the source.
What is current drain cells?
the current in the drain circuit of a field effect transistor.
How electric current have magnetic effect?
The magnetic force acts only on moving electric charges; A constant electric current produces an unchanging magnetic field and a changing electric current produces a changing magnetic field.
How can you connect burden in current transformer?
Yes
What is field current?
What is field current
One important effect derived from electricity?
electromagnetic field around a conductor when ever current flows through it.
What is the name of the electrical part that is used to change the amount of current that flows to a heater motor?
A resistor resists the flow of current in a circuit but a transistor changes the amount of current through a device. This is called current magnification. Field effect transistors FETs and MOSFETs (metal oxide semiconductor field effect transistor) may also change the amount of current to a load lastly a variable resistor or a potentiometer or a variable resistor can variate the amount of current at your will
Where the potential energy the magnet gets in Meissner effect come from?
The Meissner effect is related to an electrical current. The energy comes from getting the current started. Any energy in a magnetic field adds to the effort of getting the current started: this is basically the same as the energy in an inductance.
What is galvanometer magnetic force and motor effect?
A motor effect is when magnetic flux lines interact with the current flow in the current conducting wire (a production of current means there is a production of a magnetic field, thus the magnetic field of a permanent magnet interacts with the magnetic field of the current), hence causing a motor effect, where electric energy is transformed into mechanical energy. In a galvanometer, the concept of the motor effect is used for it to detect and measure the magnitude of small electric currents as an instrument. A galvanometer uses radial magnets which cover more area of the rotor (this is where the needle is attached), as this rotor consists of an armature and loops of wire, it is perpendicular to the magnetic flux lines of the radial magnet. Therefore as the current flows through the coil, a magnetic field is produced, and the motor effect occurs allowing the needle to move on the scale.
