The resistivity of blood is related to its hematocrit, the volume fraction of red blood cells in the blood. A commonly used equation relating the hematocrit h the blood resistivity ρ (in Ω⋅m) is ρ=1.32/(1−h)−0.79. In one experiment, blood filled a graduated cylinder with an inner diameter of 0.90 cm. The resistance of the blood between the 1.0 cm and 2.0 cm marks of the cylinder was measured to be 210 Ω. What was the hematocrit for this blood?

Q: You are working at a company that manufactures electrical wire. Gold is the most ductile of all…

A: resistance, R=ρlA where, ρ=resistivity of gold=2.44×10-8Ωm l=length of the wire A=surface area of…

Q: When all the ion channels in a cell membrane are closed, the resistivity is very high. However if…

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Q: A teapot with a surface area of 715 cm is to be plated with silver. It is attached to the negative…

A: Surface area (A) = 715 cm2Potential difference of the battery (V) = 12 volts Resistance (R) = 1.5…

Q: Charges can move across the cell membrane, so it is not a perfect insulator; the cell membrane has a…

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Q: Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.15…

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Q: The resistivity of copper is 1.70 x 10-8 2. m. HINT Apply the expression relating resistance to…

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Q: An engineering intern is studying the effect of temperature on the resistance of a current carrying…

A: Consider the first case,  initial temperature, T = 20 oC Final temperature, T1 = 54 oC Change in…

Q: Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.38…

A: The volume of a material is calculated by using the formula V=mρ , where m=0.001 kg is the mass and…

Q: Consider a portion of a cell membrane that has a thickness of 7.50 nm and 1.9 um x 1.9 um in area. A…

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Q: Iwo conductors are made of the same material and have the same length. Conductor A is a sol is a…

A: We know that the formula of the resistance is given as  R= ρLA ----- eq1  where R is the Resistance,…

Q: A cylindrical aluminum pipe of length 2.49 m has an inner radius of 2.11 × 10-3 m and an outer…

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Q: A 60 W lightbulb has a resistance of 240 Ω. At the operating temperature of the tungsten filament,…

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Q: What is the resistance of a 21-cm-long column of blood in a 0.80-cm- diameter femoral artery? The…

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Q: What is the resistance (in units of 0) of a wire made of a material with a resistivity of 3.2 x…

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Q: Nerve impulses are carried along axons, the elongated fibers that transmit neural signals. We can…

A: Given Diameter  = 10 μm Specific resistance ρ = 0.5 ohm. meter Length l = 7 mm To Find out…

Q: Aluminum has a resistivity of 2.65 × 10-8 2 × m. What is the resistance of 15 m of aluminum wire…

A: We have given        Resistivity (Rho) = 2.65 × 10-8 ohm_meter And.             Length (l) = 15 m…

Q: At the left end. the resistivity is 2.25*10-8 Ω.m and the right side is 4.50*10-8m. (a) What is the…

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Q: The resistivity of aluminum is 2.82 ✕ 10−8 Ω · m.   (a) Find the resistance of an aluminum wire (in…

A: Given: The resistivity of the aluminum is 2.82 ✕ 10−8 Ω · m. The radius of the wire is 1.32 mm. The…

Q: What is the maximum power deliverable b a stack of 100 10YSZ cells to an optimum resistive load?…

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Q: A piece of wire has resistance of 1.25 2. The wire is made of a material with resistivity 8.2x10-7…

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Q: The resistance of a copper wire is measured to be 3.80 Ω at 21.6°C. What is the resistance of this…

A: Write down all the given parameters and formula

Q: In a discharge tube, the number of hydrogen ions 18 (i.e., protons) drifting across a cross-section…

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Q: Consider a portion of a cell membrane that has a thickness of 7.50 nm and 1.2 um x 1.2 um in area. A…

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Q: Suppose that the resistance between the walls of a biological cell is 5.9 × 109 Ω. (a) What is the…

A: Given that:- Resistance between the walls of a biological cell=5.9×10^9 ohm

Q: As the temperature of a metal rod varies, so does the resistance and the dimensions of the rod. If a…

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Q: A copper wire is having a length of 8m and a radius of 32mm. The resistivity (p) of copper is…

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Q: Two conductors are made of the same material and have the same length. Conductor A is a solid wire…

A: RA=pLπrA2RB=pLπr22-r12

Q: A certain lightbulb has a tungsten filament with a resistance of 18.5 N when cold and 136 N when…

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Q: What is the resistance of a 3.4-mm length of copper wire 1.3 mm in diameter? The resistivity of…

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Q: A certain laboratory experiment requires an aluminum wire of length of 36.0 m and a resistance of…

A: The expression for the resistance of wire is, R=ρLA                               L=length of…

Q: What current flows through a 2.15 cm diameter rod of pure silicon that is 20.5 cm long, when 1000 V…

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Q: As part of a class project you are given 0.900 g of copper and asked to fabricate a wire with…

A: (a)  Using the expression for resistance, R=ρCuLAL=RρCuAL=0.913 Ω1.72×10-8 ΩmAA=L5.308×107 m-1

Q: Consider a portion of a cell membrane that has a thickness of 7.50 nm and 1.8 pm x 1.8 pm in area. A…

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Q: A wire is made out of aluminum with a cross-sectional area of 5.75×10−4 m2 and a length of 40 km.…

A: The resistance of the aluminium wire is

Q: As part of a class project you are given 0.900 g of copper and asked to fabricate a wire with…

A: Given,  Mass, m=0.9g Resistance, R=0.803Ω Resistivity, ρ=1.72×10-8Ωm Density, d=8.92×103kg/m3 Used…

Q: Two wires with the same resistance have the same diameter but different lengths. If wire 1 has…

A: Given Information:- Resistance and diameter of the two wires are same. Resistivity of copper is…

Q: As part of a class project you are given 0.900 g of Nichrome and asked to fabricate a wire with…

A: Mass of wire = 0.9 g Percentage of nichrome used = 95%Therefore, mass of nichrome used = 0.95×0.90…

Q: A length of 120 cm from Aluminum cylinder with a cross-sectional area of 2.82 x 10 m2, the…

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Q: Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.35…

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Q: A copper wire has a length of 38.0 m and a resistance of 4.10 Q at 20.0°C. Assuming a circular…

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Q: A wire is made of a material with a resis- tivity of 2.97138 x 10-8 2 · m. It has length 2.16443 m…

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Q: Suppose that the resistance between the walls of a biological cell is 5.7 × 109 Ω. (a) What is the…

A: The difference between two points is known as the potential difference. Any sort of potential is…

Q: A copper wire of radius a = 0.172 mm has an aluminum jacket of outer radius b = 0.231 mm. There is a…

A: Given: Radius of Copper,RC=0.172mm=0.172×10-3mOuter Radius of…

Q: Figure a shows a rod of resistive material. The resistance per unit length of the rod increases in…

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.