define impedance field
27bbf5e73b7b390ced6d8c7321636e69
What is electrical impedance? Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied. In quantitative terms, it is the complex ratio of the voltage to the current in an alternating current (AC) circuit. Impedance extends the concept of resistance to AC circuits, and possesses both magnitude and phase, unlike resistance, which has only magnitude.
9dbcbb25644c8fa3230ab8c825b4501a
Static Fields 1 A magnetic field is a force field created by a magnet or as a consequence of the movement of the charges (flow of electricity). The magnitude (intensity) of a magnetic field is usually measured in Tesla (T or mT).  The term static refers to a situation where the fields do not vary with time. Static electric and magnetic fields are two distinct phenomena, both characterized by steady direction, flow rate and strength (thus a frequency of 0 Hz). A static electric field (also referred to as electrostatic field) is created by charges that are fixed in space;
5edd4b25f67b1f3036e56059ae98b7f6
What is a load resistance? , Instructor of courses on circuits and electronics for almost 30 yrs. 1  The load resistance or, more generally, the load impedance (in AC circuits) is the equivalent resistance (or impedance) of the device attached to the output of a given circuit or system. For instance, the equivalent impedance of a loudspeaker is the load impedance of an audio amplifier.
ab819ee0619e0e85321ef730d90a5631
field field - (mathematics) a set of elements such that addition and multiplication are commutative and associative and multiplication is distributive over addition and there are two elements 0 and 1; the set of all rational numbers is a field
f5c35048bd8d7013e9cc79ef480f1230
Electricity The electric field is a component of the electromagnetic field. It is a vector field, and it is generated by electric charges or time-varying magnetic fields as described by Maxwell's equations. The concept of an electric field was introduced by Michael Faraday.
538c140eb1a7aeb3deed6bccbd1426b5
- Electric field. An electric field is a vector field that associates to each point in space the Coulomb force that would be experienced per unit of electric charge, by an infinitesimal test charge at that point. Electric fields are created by electric charges and can be induced by time-varying magnetic fields.
b9c0ca6f610eaa931e82536f57992304
- As for usual plane waves, we define the complex impedance as Z (z) = E (z) / H (z) where the electric field is given by Eq. and the magnetic field is H (z) = (− i c / ω) (∂ E / ∂ z), according to the Maxwell equations. Since the right and left propagating waves are complex conjugate of each other, their impedances are related as Z + = − Z − ∗.
5c0d7c8dd1d5003967990ad5264be242
Impedance Impedance is the complex-valued generalization of resistance. It may refer to: Acoustic impedance, a constant related to the propagation of sound waves in an acoustic medium.
2c7876b86daa3e77ee3eb9ea1fd48cd7
Definitions &Translations Editors Contribution(0.00 / 0 votes)Rate this definition: earth magnetic field. The magnetic field around and through the planet earth. Planet earth has it's own magnetic field that connects to the magnetic field of the universe. Chaldean Numerology. The numerical value of earth magnetic field in Chaldean Numerology is: 1.
83eb241855b9110a5241e61645ba9c6e
Electric Field Lines These pattern of lines, sometimes referred to as electric field lines, point in the direction that a positive test charge would accelerate if placed upon the line. As such, the lines are directed away from positively charged source charges and toward negatively charged source charges.o communicate information about the direction of the field, each line must include an arrowhead that points in the appropriate direction. An electric field line pattern could include an infinite number of lines.
2482cc4742e499c7796c815ef8126033
Antenna Impedance Impedance relates the voltage and current at the input to the antenna. The real part of the antenna impedance represents power that is either radiated away or absorbed within the antenna. The imaginary part of the impedance represents power that is stored in the near field of the antenna.
15850d2d9f411b3ef5e0aee90ffe0315
impedance impedance - Computer Definition The total passive opposition offered by a circuit to the flow of an alternating electric current (AC), impedance is a combination of resistance, inductive reactance, and capacitive reactance.
afba4a631aea945ebe40587fb6e06a4c
Electric and Magnetic Fields (EMF) Electric and magnetic fields (EMF) are invisible lines of force that surround any electrical device. Electrical wiring, electrical equipment and power lines all produce electric and magnetic fields. Electrical fields and magnetic fields can be characterized by their wavelength, frequency and amplitude (strength).
2392964a1f5b1eacb4c66f60009e601c
"What does ""impedance"" mean and what are ""Ohms""?" The impedance of a circuit in an amplifier is designed to match the impedance of a speaker or earphone so there is no best impedance, just what the circuit will work best at. Impedance is measured in Ohms just like resistance and that is the similarity. It is the resistance of the circuit to the voltage applied to a device in a pulsating or alternating current. So you buy headphones whose impedance matches the device you are buying the phones for. Source(s):
7a4e6bddcf6fff36a91179767959d9ec
Contact Q.What is the difference between common mode impedance, differential mode impedance and characteristic impedance? A. Common mode impedance: refers to a characteristic in response to common mode signals (noise). Differential mode impedance: refers to a characteristic in response to leakage inductance. Characteristic impedance: refers to the line impedance when two lines of a common mode filter / choke are considered as a differential transmission line. It has no correlation with the common mode impedance. It is determined by the balance between the leakage impedance and the line capacity.
0b6bb1163918af364b3786e6a9ac2126
Order History Order History. Customers can use Order History for a powerful and easy way to refer to a chronological record of your purchases. Order History will show you all the orders that you have placed with us. To see more information about a particular order, click on the order number.
d24dd77e8126768d80e841dbda53b4b5
Electric Field Intensity Electric field strength is a vector quantity; it has both magnitude and direction. The magnitude of the electric field strength is defined in terms of how it is measured. Let's suppose that an electric charge can be denoted by the symbol Q.
bead28ee6f970f4788f9c1a871d22deb
Static Fields Static electric and magnetic fields are two distinct phenomena, both characterized by steady direction, flow rate and strength (thus a frequency of 0 Hz). A static magnetic field is created by a magnet or charges that move as a steady flow (as in appliances using direct current).
67cd23c4d207685c7380b4e83168dcc8
What is Impedance? In the case of direct current (DC), impedance is the same as resistance, and depends solely upon the materials from which the circuit is made. For an alternating current (AC), however, two additional factors can contribute to the impedance: capacitance and inductance. Together these are known as reactance, which is a measure of opposition to a change in current that depends on its frequency, and on the components of the circuit. Alternating current is constantly changing direction, and does so at a given frequency, which is measured in Hertz (Hz), or cycles per second.
75fb3893f3b4996fa5a8fb4b61518e41
- Electrical impedance: Electrical impedance,, measure of the total opposition that a circuit or a part of a circuit presents to electric current. Impedance includes both resistance and reactance
e4c86cb1139627d35f0b21f9c5dd1531
Coaxial Cable Tutorial The inner and outer coaxial diameter ratios and the dielectric constant in the cable define the parameters involved in determining characteristic impedance. Insertion Loss: A measurement of attenuation determined by the system output before and after the connection of a cable and/or device.
1aee207e89e6f35981cdb945ab0d6a4f
Electric Field Electric Field. Electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it would exert on a positive test charge. The electric field is radially outward from a positive charge and radially in toward a negative point charge. Click on any of the examples above for more detail. Lorentz force law
6d9da1af81e43112162cc771b4c1aeeb
Electric Field Electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it would exert on a positive test charge. The electric field is radially outward from a positive charge and radially in toward a negative point charge.
2fa78f498e491319f7a8dfbf8d0d10ea
What are electromagnetic fields? Electric fields. 1  Electric fields arise from voltage. 2  Their strength is measured in Volts per metre (V/m) 3  An electric field can be present even when a device is switched off. 4  Field strength decreases with distance from the source. 5  Most building materials shield electric fields to some extent.
b94fa57b701269a93e8ecf963b33f26f
Bio-Electrical Impedance Analysis (BIA) - Body Mass Analysis What is Bio-Electrical Impedance Analysis (BIA)? Bio-electrical Impedance Analysis or Bioimpedance Analysis (BIA) is a method of assessing your body composition, the measurement of body fat in relation to lean body mass. It is an integral part of a health and nutrition assessment. Research has shown that body composition is directly related to health.
addd7170abe8b8dfc2273fa36080869d
Cable impedance What is the cable impedance and when it is needed? The basic idea is that a conductor at RF frequencies no longer behaves like a regular old wire. As the length of the conductor (wire) approaches about 1/10 the wavelength of the signal it is carrying - good ol' fashioned circuit analysis rules don't apply anymore. This is the point where things like cable impedance and transmission line theory enter the picture.