We define length as the physical dimensional measurement of extension between any two given points. The relation between length and resistivity is given by the resistivity formula, i.e, ⍴ = R/L. Resistance varies directly with the length of the wire. It means that any variation in the len...
From the above relation, it can be concluded that the resistance depends upon the dimensions of the wire. Here, the resistance is directly proportional to the length which means for a fixed area of cross-section and resistiv...
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The resistance of a wire is directlyproportional to its lengthand inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. ... The resistance of a conductor, or circuit element, generally increases with increasing temperature. Does resistance depend...
Then cut the sample into two equal parts and compressing the two equal parts with mechanical pressure. Again, resistance is measured. By assuming that the length of material is not changed, the measured resistance will always be larger than the initial value. The reason for this increased ...
With most metals a rise in temperature causes an increase in electrical resistance, and since resistance can be measured accurately this property can be used to measure temperature. If the resistance of a length of wire at 0°C is and its resistance at 0°C is R0, and its resistance at ...
relation between the current flowing through a metallic wire and the potential difference applied across the wire. According to him, With the temperature remaining constant, the current flowing through the given metallic wire in an electric circuit is directly proportional to the potential difference ...
maintaining the resistance value. In a conducting material if the length of the wire is so long then it has a large number of free electrons in it. So these electrons will get enough kinetic energy when they got sufficient input voltage. And these electrons get a collision with other ...
For long, flush-mounted anodes with L greater than or equal to 4 times the width and thickness: (6.16)R=ρ2⋅S For noncylindrical anodes, r = c/(2π), where c (in m) is the anode cross-sectional periphery. S is the arithmetic mean of anode length and width. For short, flush...
relation given approximately byV= 30 + 10/I+l[1+ 3/I]103for a currentIin an arc lengthlmetres. The expression is roughly equivalent to 10 V/cm for large currents and high voltages. The current density varies between 1 and 1000 A/mm2, being greater for large currents because of the...