Nichrome has a resistivity of 100×108 Nm at normal temperature. Estimate the resistance at 250°C.
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Q: Nichrome alloy has a resistivity of 110 x 10-6 Ncm. From a roll of nichrome wire of 2.5 mm diameter,…
A: Given values: Resistivity, ρ=110×10-6 Ωcm Radius, r=2.5 mm2=1.25 mm Length, l=1 m
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- A current of 0.228 A flows through a(n) 8.22 Q resister. Calculate the voltage drop across the resister. Express your answer to three significant figures. The voltage drop is Volts.What temperature should a copper wire (which is originally at 20°C) reach to increase its resistance by 12%? Information: alpha = 0.0068 (C^-1) Help: The final resistance of the copper wire is R = 1.12Ro Write your answer with 2 significant figures.1. Nichrome is a metal alloy that has a resistivity of 108 X 10Q m. a) What is the resistance of a nichrome wire of length 5.00 m and diameter 1.32 mm? b) If the wire in part (a) above is connected to a cell of emf 1.55 volts and it is found that a current of 365 mA flows, what is the Internal resistance of the cell?
- 2. Page > of 3 5. Two long coaxial metal cylinders with radii a and b are separated by material of conductivity o (see figure below). The conductivity is not uniform and changes as = (s)0 where k is a constant. If the two cylinders are kept at a potential difference V, find the resistance R between the cylinders. (s)o Hint: Since the conductivity is a function of position, the charge density in the resistive medium is not zero and E does not go like 1/s. However, since the current I is steady, the same current flows across each eylindrical surface. Instead of using Gauss' Law, find E in terms of I, from Ohm's Law. acer F10 F11Nichrome alloy has a resistivity of 110 × 10−6 Ωcm. From a roll of nichrome wire of 2.5 mmdiameter, a length 1 m long is taken.a) Calculate the resistance R and the conductance G of the piece of wire.b) A second piece also 1 m long is connected in parallel to the first. Calculate the resistanceand conductance of the pair.