Wires 1 and 2 are made of the same metal. Wire 2 has twice the length and twice the diameter of wire 1. What are the ratios (a) ρ2 / ρ1 of the resistivities and (b) R2 / R1 of the resistances of the two wires?
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Wires 1 and 2 are made of the same metal. Wire 2 has twice the length and twice the diameter of wire 1. What are the ratios (a) ρ2 / ρ1 of the resistivities and (b) R2 / R1 of the resistances of the two wires?
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- Wires 1 and 2 are made of the same metal. Wire 2 has twice the length and halfthe diameter of wire 1. What are the ratios (a) ρ2/ρ1of the resistivities and (b) R2/R1of the resistances of the two wires?The lengths of two conductor wires made of different materials are given as L1=2L2 and their resistance as R1=2R2. The cross-sectional area of the first wire is 0.025 m2 and the cross-sectional area of the second wire is 0.050 m2. What is the resistivity ratio of these two wires (r1/r2)?Resistance depends on the size and shape of a conductor. We expect a long wire to have higher resistance than a short one (everything else being the same) and a thicker wire to have a lower resistance than a thin one. Resistance also depends on the intrinsic property of the conductor called the resistivity. If the resistivity of a particular wire is 12.08x10-8 N · m, the wire is 14.22mm in length, and the radius of the diameter of the wire is 1.33m, what is the resistance of the wire in units of Ohms (N)? Note: It is understood that the unit of your answer is in Ohms (), however do not explicitly include units in your answer. Enter only a number. If you do enter a unit, your answer will be counted wrong.
- Most of the resistance of the human body comes from the skin, as the interior of the body contains aqueous solutions that are good electrical conductors. For dry skin, the resistance between a person’s hands is typically 510 kiloohm. The skin is on average about 2.00 mm thick. We can model the body between the hands as a cylinder 1.60 m long and 12.0 cm in diameter with the skin wrapped around it. What is the resistivity of the skin?As part of a class project you are given 0.900 g of copper and asked to fabricate a wire with uniform cross-section. You use up 95% of the copper and make a wire with a resistance of 0.853 Ω. The resistivity of copper is 1.72 10-8 Ω · m and its density is 8.92 103 kg/m3. What length of wire do you end up with? What is the diameter of the wire?A copper wire is having a length of 8m and a radius of 32mm. The resistivity (p) of copper is 1.72x108 Qm. Calculate the resistance (R) of the wire. i) The area of cross section (A) of the wire (in m²) = %3D ii) The resistance (R) of the wire (in Q) =
- Resistance depends on the size and shape of a conductor. We expect a long wire to have higher resistance than a short one (everything else being the same) and a thicker wire to have a lower resistance than a thin one. Resistance also depends on the intrinsic property of the conductor called the resistivity. If the resistivity of a particular wire is 70.26x10-8 Ω ⋅ m, the wire is 44.47mm in length, and the radius of the diameter of the wire is 1.95m, what is the resistance of the wire in units of Ohms (Ω)?A metallic conductor has resistivity of 18 x 10-6 W.m. what is the resistance of a piece that is 30 m long and has a uniform circular cross section area 2.2 mm2? 0.245 W 245.5 W 1.32 x 10-8 W 119 WAssuming that you wish to make a uniform wire out of 2 grams of copper. If the wire is to have a resistance R= 0.75 Ω, and if all of the copper wire is to be used, what will be the (a) length, and (b) diameter of the wire? Density of Cu= 8.92 x 10^3 kg/m^3. Resistivity of Cu = 1.7 x 10^-8 (Ω-m)