1 - Scioly.org
... connected to an AC generator having an EMF of 120 V. a. Calculate the EMF of the secondary. b. Find the current in the primary circuit if the current in the secondary is 3.0 A. c. What power develops in the primary? In the secondary? 2. The secondary of a step-down transformer has 50 turns. The prim ...
... connected to an AC generator having an EMF of 120 V. a. Calculate the EMF of the secondary. b. Find the current in the primary circuit if the current in the secondary is 3.0 A. c. What power develops in the primary? In the secondary? 2. The secondary of a step-down transformer has 50 turns. The prim ...
Speaker Lab:
... Electricity and Magnetism are related. Current in a wire (moving electrons) produces a magnetic field around it. Changing current has a changing magnetic field around the wire. Current produces magnetic fields. Electricity can also be created from a changing magnetic field. By moving a magnet over a ...
... Electricity and Magnetism are related. Current in a wire (moving electrons) produces a magnetic field around it. Changing current has a changing magnetic field around the wire. Current produces magnetic fields. Electricity can also be created from a changing magnetic field. By moving a magnet over a ...
Be the source: Deliverying current electricity
... ground from your house back to the power station which is one reason why good earthing is so important! In some countries all three phases are used in houses but in the UK we only use one single phase in homes. Factories use all three phases for greater power. ...
... ground from your house back to the power station which is one reason why good earthing is so important! In some countries all three phases are used in houses but in the UK we only use one single phase in homes. Factories use all three phases for greater power. ...
What do all these have in common? What are they - Physics-S3
... What do all these have in common? What are they used for? ...
... What do all these have in common? What are they used for? ...
Inductance – Ch 4
... – Inductors allow DC to pass, but hinder AC; – Inductors store energy as a magnetic field; and – As the frequency increases, inductive reactance increases (and vice versa!). ...
... – Inductors allow DC to pass, but hinder AC; – Inductors store energy as a magnetic field; and – As the frequency increases, inductive reactance increases (and vice versa!). ...
Document
... phase shift angle of the half-bridge modules is 0 degree to be a symmetrical operation, which makes the resonant tank operating frequency only equal to the switching frequency of the power devices. By regulating the duty cycles of the upper and lower switches in each half-bridge module to be 0.75 an ...
... phase shift angle of the half-bridge modules is 0 degree to be a symmetrical operation, which makes the resonant tank operating frequency only equal to the switching frequency of the power devices. By regulating the duty cycles of the upper and lower switches in each half-bridge module to be 0.75 an ...
Tutorial 2 (AC Fundamentals)
... Calculate the inductance associated with each coil Answers a) R1= 10Ω, R2= 15Ω b) Z1=70Ω, Z2=50Ω, c) X1=69.3Ω, X2=47.6Ω, d) L1=0.28H, L2=0.19H ...
... Calculate the inductance associated with each coil Answers a) R1= 10Ω, R2= 15Ω b) Z1=70Ω, Z2=50Ω, c) X1=69.3Ω, X2=47.6Ω, d) L1=0.28H, L2=0.19H ...
Harvesting acoustic energy using a straight
... interruption of acoustic air particle motion caused by the presence of plates; • When the incident SPL is 112 dB, the simulated output power of the acoustic energy ...
... interruption of acoustic air particle motion caused by the presence of plates; • When the incident SPL is 112 dB, the simulated output power of the acoustic energy ...
Capacitive element based sensor
... shown in Figure 2.2.7, say, more in secondary coil 1 than in coil 2, then more emf is generated in one coil i.e. coil 1 than the other, and there is a resultant voltage from the coils. If the magnetic core is further displaced, then the value of resultant voltage increases in proportion with the dis ...
... shown in Figure 2.2.7, say, more in secondary coil 1 than in coil 2, then more emf is generated in one coil i.e. coil 1 than the other, and there is a resultant voltage from the coils. If the magnetic core is further displaced, then the value of resultant voltage increases in proportion with the dis ...
Inductors: Resonance and simulations
... A significant improvement consists in using metal layers in parallel, The selection of metal2, up to metal6 reduces the parasitic resistance of R1 by a significant factor, while the capacitance of C1 and C2 is not changed significantly. The result is a quality factor near 6. Even when the conducto w ...
... A significant improvement consists in using metal layers in parallel, The selection of metal2, up to metal6 reduces the parasitic resistance of R1 by a significant factor, while the capacitance of C1 and C2 is not changed significantly. The result is a quality factor near 6. Even when the conducto w ...
A lamp rated at 12 V 60 W is connected to the secondary coil
... This part was not done well. Candidates needed to explain that resistance leads to energy loss in transmission, that lower current reduces this loss and that lower current can be achieved using a transformer with ac. Many misconceptions were, however, apparent in responses. For example, ‘using dc yo ...
... This part was not done well. Candidates needed to explain that resistance leads to energy loss in transmission, that lower current reduces this loss and that lower current can be achieved using a transformer with ac. Many misconceptions were, however, apparent in responses. For example, ‘using dc yo ...
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.