Word
... XC = 2fC . When the frequency is doubled the capacitive reactance is halved. 2. Current and voltage in capacitors and inductors. a. The current through and voltage across a capacitor are out of phase. The voltage across the capacitor depends on the charge stored on the capacitor. As the voltage (an ...
... XC = 2fC . When the frequency is doubled the capacitive reactance is halved. 2. Current and voltage in capacitors and inductors. a. The current through and voltage across a capacitor are out of phase. The voltage across the capacitor depends on the charge stored on the capacitor. As the voltage (an ...
1.1 Magnetic Field Modeling 1.1.1 Magnetic Field Around a Current
... and the reader antenna, which depends on how much magnetic flux is shared between the two. This is a function of orientation, tag-reader separation distance/position, tag coil turns and geometry, antenna loop turns and geometry, and material environment. Ltag Tag Self-Inductance: This term is the se ...
... and the reader antenna, which depends on how much magnetic flux is shared between the two. This is a function of orientation, tag-reader separation distance/position, tag coil turns and geometry, antenna loop turns and geometry, and material environment. Ltag Tag Self-Inductance: This term is the se ...
Electromagnetism
... Stand the C core on its curved side and put the post card on the top of the flat ends. Sprinkle some iron filings onto the post card. Is there a pattern? What does this prove about the C core? Now switch on the current. Draw the pattern that you see - it helps to tap the card gently. Repeat the expe ...
... Stand the C core on its curved side and put the post card on the top of the flat ends. Sprinkle some iron filings onto the post card. Is there a pattern? What does this prove about the C core? Now switch on the current. Draw the pattern that you see - it helps to tap the card gently. Repeat the expe ...
Transducer
... E2 is decreased, resulting in the differential voltage (E1 - E2). Conversely, if the core is moved closer to S2, more flux is coupled to S2 and less to S1, so E2 is increased as E1 is decreased, resulting in the differential voltage (E2 E1). ...
... E2 is decreased, resulting in the differential voltage (E1 - E2). Conversely, if the core is moved closer to S2, more flux is coupled to S2 and less to S1, so E2 is increased as E1 is decreased, resulting in the differential voltage (E2 E1). ...
1) Complete each sentence using an appropriate phrase from this
... formed between it and the pole pieces. A pointer is (10) the former and traverses a linear scale. 3) With the help of the diagram, fill in the gaps. Each gap represents one word. The description should answer these questions: ...
... formed between it and the pole pieces. A pointer is (10) the former and traverses a linear scale. 3) With the help of the diagram, fill in the gaps. Each gap represents one word. The description should answer these questions: ...
DN130 - Power Supplies for Subscriber Line Interface Circuits
... regulation, lowers the voltage rating required on the output capacitors and lowers the RMS currents, allowing the use of cheaper output capacitors. Either the – 23.8V output or the – 71.5V output can be at full load without effecting the other corresponding output. The circuit’s step response is ver ...
... regulation, lowers the voltage rating required on the output capacitors and lowers the RMS currents, allowing the use of cheaper output capacitors. Either the – 23.8V output or the – 71.5V output can be at full load without effecting the other corresponding output. The circuit’s step response is ver ...
I 2
... Power Output = |VL| |IL| cos = |IL|2 RL Power Input = Power Output + Cu losses + Core losses Cu Loss – varies with load current Core Loss – depends on voltage (usually a constant for practical purposes) Transformer efficiency is maximum when ...
... Power Output = |VL| |IL| cos = |IL|2 RL Power Input = Power Output + Cu losses + Core losses Cu Loss – varies with load current Core Loss – depends on voltage (usually a constant for practical purposes) Transformer efficiency is maximum when ...
PHYS 202 OUTLINE FOR PART II MAGNETISM Magnetism
... (just like E acts on charges, E due to charges, just like g acts on masses, g due to masses) ...
... (just like E acts on charges, E due to charges, just like g acts on masses, g due to masses) ...
1.2kV Class Energy Efficient Autotransformer
... Install optional vibration isolation pads between transformer enclosure and the mounting surface. Install seismic restraint where indicated on the drawing. Coordinate all work in this section with all work of other sections. Take Infrared Picture to verify connections accuracy or deficiencies. Prior ...
... Install optional vibration isolation pads between transformer enclosure and the mounting surface. Install seismic restraint where indicated on the drawing. Coordinate all work in this section with all work of other sections. Take Infrared Picture to verify connections accuracy or deficiencies. Prior ...
Motors and Generators #2
... Forces on the sides ab and cd: Experience maximum force since the current in them is perpendicular to the magnetic field Magnitude of the force does not change throughout its rotation Using the right hand palm rule, the direction of the force on sides ab and cd can be deduced The net result ...
... Forces on the sides ab and cd: Experience maximum force since the current in them is perpendicular to the magnetic field Magnitude of the force does not change throughout its rotation Using the right hand palm rule, the direction of the force on sides ab and cd can be deduced The net result ...
Resonant inductive coupling
Resonant inductive coupling or electrodynamic induction is the near field wireless transmission of electrical energy between two magnetically coupled coils that are part of resonant circuits tuned to resonate at the same frequency. This process occurs in a resonant transformer, an electrical component which consists of two high Q coils wound on the same core with capacitors connected across the windings to make two coupled LC circuits. Resonant transformers are widely used in radio circuits as bandpass filters, and in switching power supplies. Resonant inductive coupling is also being used in wireless power systems. Here the two LC circuits are in different devices; a transmitter coil in one device transmits electric power across an intervening space to a resonant receiver coil in another device. This technology is being developed for powering and charging portable devices such as cellphones and tablet computers at a distance, without being tethered to an outlet.Resonant transfer works by making a coil ring with an oscillating current. This generates an oscillating magnetic field. Because the coil is highly resonant, any energy placed in the coil dies away relatively slowly over very many cycles; but if a second coil is brought near it, the coil can pick up most of the energy before it is lost, even if it is some distance away. The fields used are predominately non-radiative, near fields (sometimes called evanescent waves), as all hardware is kept well within the 1/4 wavelength distance they radiate little energy from the transmitter to infinity.One of the applications of the resonant transformer is for the CCFL inverter. Another application of the resonant transformer is to couple between stages of a superheterodyne receiver, where the selectivity of the receiver is provided by tuned transformers in the intermediate-frequency amplifiers. The Tesla coil is a resonant transformer circuit used to generate very high voltages, and is able to provide much higher current than high voltage electrostatic machines such as the Van de Graaff generator. Resonant energy transfer is the operating principle behind proposed short range (up to 2 metre) wireless electricity systems such as WiTricity or Rezence and systems that have already been deployed, such as Qi power transfer, passive RFID tags and contactless smart cards.