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Electric fences were used to control livestock in the United States in the early 1930s, [citation needed] and electric fencing technology developed in both the United States and New Zealand. [sentence fragment] An early application of the electric fence for livestock control was developed in 1936–1937 by New Zealand inventor Bill Gallagher.
The actual output impedance for most devices is not the same as the rated output impedance. A power amplifier may have a rated impedance of 8 ohms, but the actual output impedance will vary depending on circuit conditions. The rated output impedance is the impedance into which the amplifier can deliver its maximum amount of power without failing.
This poses a particular problem when distributed generation, such as wind farms and rooftop solar power, is added to an existing electric grid. It is desirable to be able to add additional power sources without large system-wide upgrades. [citation needed] A simple solution is to add electrical impedance to the circuit. This limits the rate at ...
For that reason, high-impedance voltage measurements of normally non-energized objects must be verified. Verification of a voltage reading is performed using a low-impedance voltmeter, which usually has a shunt resistor load bridging the voltmeter terminals. Since very little current can flow from a coupled surface through the small shunt or ...
Aug. 26—Local car dealers exasperated by catalytic converter theft are testing the saying that no one zapped by an electric fence makes that mistake twice. About a dozen vehicle sales and rental ...
The electronics of the IEPE sensor (typically implemented as FET circuit) converts the high impedance signal of the piezoelectric material into a voltage signal with a low impedance of typically 100 Ω. A low impedance signal is advantageous because it can be transmitted across long cable lengths without a loss of signal quality. In addition ...
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