2E7 Engineering Science: Electrical Engineering
... In the previous analysis of dc circuits all voltages and currents were constant, not varying with time. There was no profile or waveform associated with the source driving an electric circuit. Thus the question of vectors having magnitude and phase did not arise. However, in the case of the analysis ...
... In the previous analysis of dc circuits all voltages and currents were constant, not varying with time. There was no profile or waveform associated with the source driving an electric circuit. Thus the question of vectors having magnitude and phase did not arise. However, in the case of the analysis ...
lab9 - Suffolk University
... produced by I1and φ2 is the flux produced by I2. In Figure 1a, it is seen by using the right-hand rule method that with the currents as shown the magnetic flux produced by the coils is additive; if the secondary current ...
... produced by I1and φ2 is the flux produced by I2. In Figure 1a, it is seen by using the right-hand rule method that with the currents as shown the magnetic flux produced by the coils is additive; if the secondary current ...
Solution
... elements are connected in series the equivalent complex impedance is equal to the sum of the complex impedance of each element: Z = ZR + ZL + ZC = 300 Ω + 200i Ω − 90.9i Ω = (300 + 109.1i) Ω. The complex impedance of each element is indicated in Fig. 8. One tic corresponds to 100 Ω. The diagram also ...
... elements are connected in series the equivalent complex impedance is equal to the sum of the complex impedance of each element: Z = ZR + ZL + ZC = 300 Ω + 200i Ω − 90.9i Ω = (300 + 109.1i) Ω. The complex impedance of each element is indicated in Fig. 8. One tic corresponds to 100 Ω. The diagram also ...
Intro_Elec 2010
... two resistors in series • Use the ammeter to measure the current in the circuit – how does it compare with the value you found for the previous circuit? • Would this value change if you placed the ammeter at different points in the circuit? Why? • Can you deduce the rule for resistors in series? • N ...
... two resistors in series • Use the ammeter to measure the current in the circuit – how does it compare with the value you found for the previous circuit? • Would this value change if you placed the ammeter at different points in the circuit? Why? • Can you deduce the rule for resistors in series? • N ...
shielding and grounding in large detectors
... for terminated transmission lines is to reduce further the shield resistance, rS. Figure 3 illustrates a transmission line connection for analog signals with a very high dynamic range (~ 5×104), which has been proven in practice. Inductance of the shield can be artificially increased by several turn ...
... for terminated transmission lines is to reduce further the shield resistance, rS. Figure 3 illustrates a transmission line connection for analog signals with a very high dynamic range (~ 5×104), which has been proven in practice. Inductance of the shield can be artificially increased by several turn ...
power PNU
... Admittance, being the reciprocal of the impedance, is also a complex number. It is measured in units of Siemens The real part of the admittance is called the conductance, G The imaginary part is called the susceptance, B These are all expressed in Siemens or (mhos) The impedance and admittance compo ...
... Admittance, being the reciprocal of the impedance, is also a complex number. It is measured in units of Siemens The real part of the admittance is called the conductance, G The imaginary part is called the susceptance, B These are all expressed in Siemens or (mhos) The impedance and admittance compo ...
Standing wave ratio
In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave's amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line.The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced ""viswar""). For example, the VSWR value 1.2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1.2 times that of the minimum AC voltage along that line. The SWR can as well be defined as the ratio of the maximum amplitude to minimum amplitude of the transmission line's currents, electric field strength, or the magnetic field strength. Neglecting transmission line loss, these ratios are identical.The power standing wave ratio (PSWR) is defined as the square of the VSWR, however this terminology has no physical relation to actual powers involved in transmission.The SWR can be measured with an instrument called an SWR meter. Since SWR is defined relative to the transmission line's characteristic impedance, the SWR meter must be constructed for that impedance; in practice most transmission lines used in these applications are coaxial cables with an impedance of either 50 or 75 ohms. Checking the SWR is a standard procedure in a radio station, for instance, to verify impedance matching of the antenna to the transmission line (and transmitter). Unlike connecting an impedance analyzer (or ""impedance bridge"") directly to the antenna (or other load), the SWR does not measure the actual impedance of the load, but quantifies the magnitude of the impedance mismatch just performing a measurement on the transmitter side of the transmission line.