Term used in Great Britain for ground. earth conductivity The conductance between opposite faces of a unit cube (usually cubic meter) of a given earth material (loam, clay, sand, rock, etc.). The volume conductivity of this earth sample is the reciprocal of its volume (not to be confused...
TheResistance Formulato calculate the material can be derived from Ohm’s Law. As theelectrical resistanceof a material depends on the voltage across the material and the current flowing through the material, the formula for this can be given as the voltage drop across the material per unit amp...
For electronic machines like voltage regulators, transistors, and other similar gadgets the expression current rating is more commonly used than ampacity, but the considerations are broadly similar. The tolerance of short-term overcurrent, however, is almost near zero forsemiconductordevices, because the...
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Ammeter, instrument for measuring either direct (DC) or alternating (AC) electric current, in amperes. An ammeter can measure a wide range of current values because at high values only a small portion of the current is directed through the meter mechanis
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