Current and Resistance
... σ is a constant called conductivity of the conductor Ohm’s Law: for many materials, the conductivity σ is constant over a wide range of electric field strength ...
... σ is a constant called conductivity of the conductor Ohm’s Law: for many materials, the conductivity σ is constant over a wide range of electric field strength ...
Chapter 26 Term083 Q17. A 10-ohm resistor has a constant current
... Q17. A 10-ohm resistor has a constant current. If 1200 C of charge flow through it in 4 minutes what is the value of the current? A) 5.0 A Q18. Two cylindrical resistors R1 and R2 are made from the same material and have the same length. When connected across the same battery, R1 dissipates twice as ...
... Q17. A 10-ohm resistor has a constant current. If 1200 C of charge flow through it in 4 minutes what is the value of the current? A) 5.0 A Q18. Two cylindrical resistors R1 and R2 are made from the same material and have the same length. When connected across the same battery, R1 dissipates twice as ...
Technical Article
... Methods for sensing position of rotor shaft In a BLDC motor, there are several methods to measure the position of the rotor shaft. One commonly implemented method is sensorless back EMF (back Electro-Motive Force) position sensing, using a Wye or Delta winding and/or the stator coil current. Unfortu ...
... Methods for sensing position of rotor shaft In a BLDC motor, there are several methods to measure the position of the rotor shaft. One commonly implemented method is sensorless back EMF (back Electro-Motive Force) position sensing, using a Wye or Delta winding and/or the stator coil current. Unfortu ...
INTEGRATED RESISTORS
... The capacitance value thus obtainable can be around 1.2nF/mm2 . The thin film or metal oxide silicon capacitor uses a thin layer of silicon dioxide as the dielectric. One plate is the connecting metal and the other is a heavily doped layer of silicon, which is formed during the emitter diffusion. Th ...
... The capacitance value thus obtainable can be around 1.2nF/mm2 . The thin film or metal oxide silicon capacitor uses a thin layer of silicon dioxide as the dielectric. One plate is the connecting metal and the other is a heavily doped layer of silicon, which is formed during the emitter diffusion. Th ...
* Magnetic Scalar Potential * Magnetic Vector Potential
... B) Magnetic Vector Potential The magnetic scalar potential is useful only in the region of space away from free currents. If J=0, then only magnetic flux density can be computed from the magnetic scalar potential The potential function which overcomes this limitation and is useful to compute B in r ...
... B) Magnetic Vector Potential The magnetic scalar potential is useful only in the region of space away from free currents. If J=0, then only magnetic flux density can be computed from the magnetic scalar potential The potential function which overcomes this limitation and is useful to compute B in r ...
The magnetic fields of electric motors and their EMC
... By comparison of the obtained values with the values in figures Fig. 4. and Fig. 5. we can find out, that the magnitude of magnetic inductance B was reduced from the value of 0,1485 T to a new one 0,006639 T under the current I = 0 A. The magnetic inductance B value was similarly reduced for the cur ...
... By comparison of the obtained values with the values in figures Fig. 4. and Fig. 5. we can find out, that the magnitude of magnetic inductance B was reduced from the value of 0,1485 T to a new one 0,006639 T under the current I = 0 A. The magnetic inductance B value was similarly reduced for the cur ...
Magnet information
... magnetic field and will attract materials to it. magnets are the less they are attracted or repelled to one another. (iron being one of the said materials) When a magnet is broken into little pieces, a north pole will appear at one of the broken faces and a south pole. Each piece, regardless of how ...
... magnetic field and will attract materials to it. magnets are the less they are attracted or repelled to one another. (iron being one of the said materials) When a magnet is broken into little pieces, a north pole will appear at one of the broken faces and a south pole. Each piece, regardless of how ...
Magnetic field
... Magnetism- a property of certain materials (e.g. iron, nickel, and cobalt) that exerts a mechanical force on other magnetic materials, and that can cause induced voltages in conductors when relative movement is present Magnet- an object that will attract iron, nickel, or cobalt and that will produce ...
... Magnetism- a property of certain materials (e.g. iron, nickel, and cobalt) that exerts a mechanical force on other magnetic materials, and that can cause induced voltages in conductors when relative movement is present Magnet- an object that will attract iron, nickel, or cobalt and that will produce ...
15.02.2016 - Erwin Sitompul
... A conductor whose function in an electric circuit is to provide a specified resistance is called a resistor. In a circuit diagram, the resistor is represented by the symbols: ...
... A conductor whose function in an electric circuit is to provide a specified resistance is called a resistor. In a circuit diagram, the resistor is represented by the symbols: ...
the free PDF resource
... The graph shows two resistors. The straight lines show that resistance is constant/not constant. Resistance= ....................... ÷ ...................... The steeper the graph the lower/higher the resistance. ...
... The graph shows two resistors. The straight lines show that resistance is constant/not constant. Resistance= ....................... ÷ ...................... The steeper the graph the lower/higher the resistance. ...
resistance - Erwin Sitompul
... The temperature of the surrounding air is 25 °C. A current of 2.2 mA flows through the block between parallel sides. (a) What is the resistance of the block if the two parallel sides are the two rectangular sides (with dimensions 1.2 cm 15 cm)? (b) The temperature of the copper block increases up ...
... The temperature of the surrounding air is 25 °C. A current of 2.2 mA flows through the block between parallel sides. (a) What is the resistance of the block if the two parallel sides are the two rectangular sides (with dimensions 1.2 cm 15 cm)? (b) The temperature of the copper block increases up ...
Electromagnetic - NUS Physics Department
... 0 is known as the Permittivity of Free Space. It is found to be related to 0 by the equation c 2 1 0 0 where c is the velocity of light (3 x 108 m/sec). ...
... 0 is known as the Permittivity of Free Space. It is found to be related to 0 by the equation c 2 1 0 0 where c is the velocity of light (3 x 108 m/sec). ...
1 Current 2 Resistance and Ohm`s Law
... thermistor : a small semiconductor crystal usde to make a sensitive electronic thermometer; its resistance is used as a thermometric property. superconductivity : materials, which as the temperature decreases, the resistivity at first decreases smoothly, like a metal, but at a critical transition te ...
... thermistor : a small semiconductor crystal usde to make a sensitive electronic thermometer; its resistance is used as a thermometric property. superconductivity : materials, which as the temperature decreases, the resistivity at first decreases smoothly, like a metal, but at a critical transition te ...
Giant magnetoresistance
Giant magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in thin-film structures composed of alternating ferromagnetic and non-magnetic conductive layers. The 2007 Nobel Prize in Physics was awarded to Albert Fert and Peter Grünberg for the discovery of GMR.The effect is observed as a significant change in the electrical resistance depending on whether the magnetization of adjacent ferromagnetic layers are in a parallel or an antiparallel alignment. The overall resistance is relatively low for parallel alignment and relatively high for antiparallel alignment. The magnetization direction can be controlled, for example, by applying an external magnetic field. The effect is based on the dependence of electron scattering on the spin orientation.The main application of GMR is magnetic field sensors, which are used to read data in hard disk drives, biosensors, microelectromechanical systems (MEMS) and other devices. GMR multilayer structures are also used in magnetoresistive random-access memory (MRAM) as cells that store one bit of information.In literature, the term giant magnetoresistance is sometimes confused with colossal magnetoresistance of ferromagnetic and antiferromagnetic semiconductors, which is not related to the multilayer structure.