Suppose you wish to fabricate a uniform wire from 2.00 g of copper. The wire is to have a resistance of R = 0.580 and all the copper is to be used. (a) What must be the length of this wire? m (b) What must be the diameter of this wire? μm
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- The resistance of wire increases from 40 – ohm at 20 0C to 50 – ohm at 70 0C. Find the temperature coefficient of resistance at 0 0C.Ferromagnetic materials have this characteristic. A. A relative permeability slightly less than one. B. A relative permeability slightly greater than one. C. A very high resistivity. D. A high relative permeability.How temperature effect conductivity? Explain with the help of following equation. m e'n7'
- Please show the exact way to make it in this simplest formsThere is a steel guide bar (According to figure), knowing that its conductivity is 7x106 (ohm - m)-1 . Determine the resistance at 45 ° C and the gauge of a copper wire for its connection.A copper wire has a resistance of 0.85 ohm at 200C. What will be its resistance at 400C ? Temperature coefficient of resistance of copper at 00C is 0.004/0C.
- Problem A potentiometer is an instrument for measuring an unknown voltage in comparison to a standard voltage. In the potentiometer shown in Figure 1.0 a 16.0-m stretch of wire AB is connected to a 9.00-V battery. The resistance per unit length of the wire is 16.0 0/mm. The movable contact P is at point B. An ammeter (circle with A inside) is connected to point A. 16.0 m A B www Figure: 1.0 A V = 9.00 Vthe resistance of copper wire with a=0.00393/C is 183ohms at 46C, its resistance would be aboutThe resistance of a copper wire is 125 ohms at 100°C. Determine the resistance at 70°C
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