Resistance in metals increases with increasing temperature according to the equation, ρ(T) = ρo(1 + α(T - To)) where α is the temperature coefficient of resistivity and ρo is the resistivity at temperature To. For a particular wire α = 9.5 × 10-3 1/°C and the resistivity is ρo = 4.5 × 10-7 Ω⋅m at To = 154 °C. a). Input an expression for the temperature T2 at which the resistance of a wire will be twice as high as at T0. b). If the wire is L = 1 m long with a radius of r = 1 cm, what is its resistance R, in Ω, at 2To?

Q: A 14-gauge copper wire has a cross-section area of 2.081 mm². The resistivity of copper at 20…

A: The initial (20oC) resistance is, R1=ρLA=1.7×10-8 Ωm100 m2.081 mm210-6 m21 mm2=0.817 Ω

Q: 1. A hollow cylinder of length L, inner radius R1 , and radius R3 is filled with two different…

A: (a)Formula for the resistance is:

Q: 1) A resistor has a value of 20 ohms (Ω) when it is at 15 degrees Celsius. If the coefficient of…

A: For question (1),Given,The resistance at  is The coefficient of thermal resistivity is The final…

Q: a. What diameter of copper wire [p = 2.65 x 10^-8 ohm.m) should be used so that a 22.0 m length will…

A: Part (a) Given: The resistivity of copper wire is ρ=2.65×10-8 Ω·m. The length of wire is L=22.0 m.…

Q: aror

A:

Q: Three resistors, R1= 30 Ω, R2= 77 Ω, and R3=R, are connected in parallel with a 12 V battery. A)…

A:

Q: From Kirchoff's law, the current I in an RC (resistor-capacitor) circuit during discharging obeys…

A:

Q: In the circuit in (Figure 1) the voltage and current expressions are v=36c-25 V, t≥ 0; 251 i = 12e…

A: Given that:v=36e-25t Vi=12e-25t mA

Q: A 5.50 m length of 1.9 mm -diameter wire carries a 780 mA current when 23.0 mV is applied to its…

A:

Q: A cylindrical conductor has resistance of R0 = 120 Ω. It has length L, radius of the cross section…

A:

Q: What is the resistance of a 3.4-m length of copper wire 1.6 mm in diameter? The resistivity of…

A:

Q: Two copper wires (call them A and B) both have length 19.0 m but wire A has a radius 7.045 mm and…

A:

Q: A cylindrical conductor has resistance of R0 = 140 Ω. It has length L, radius of the cross section…

A:

Q: The resistivity of a metal increases slightly with increased temperature. This can be expressed as…

A:

Q: A.)For each set of measurements given in the table taken on wires of three different lengths,…

A: R = pL /A  R= resistance p = resistivity  Consider A= 1m2 crossection

Q: A copper wire with 4mm diameter, 2.0m length carries 6.0 ampere of current. Free electron density of…

A: Given, current passing through wire is, I = 6A length of wire, L = 2m free electron density, n = 8.5…

Q: 2. a) The resistivity of copper is 1.7241 x 10-8 (-m) at 20°C. What is the conductivity of copper at…

A:

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

A:

Q: A cylindrical conductor has resistance of R0 = 120 Ω. It has length L, radius of the cross section…

A: Given that,resistance, R=120 Ωlength of resistor=Lradius=rresistivity=ρ

Q: The resistivity of a metal increases slightly with increased temperature. This can be expressed as p…

A: Given data, Final resistance R=0.25 Ω Initial resistance R0=0.25 Ω Constant α=3.9×10-3 °C-1…

Q: ong wire is made of a metal with the same electron density as copper. The wire ed across the…

A: L=1.5mV=9v

Q: A copper wire has radius r = 0.314 cm, is 6.00 m long, has resistivity p = 1.72-10-82 m, and carries…

A:

Q: A cylindrical conductor has resistance of R0 = 950 Ω. It has length L, radius of the cross section…

A: Resistance of the cylindrical conductor is Ro = 950 Ω Length of conductor = L Radius of…

Q: A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4212…

A:

Q: An electrical conductor designed to carry large currents has a circular cross section 2.10 mm in…

A: Given, Diameter of the conductor, d=2.10mm Radius of the conductor, r=d2r=2.102r=1.05mmr=1.05×10-3m…

Q: Material= Lead Resistivity (Ω.m) = 22 x 10- 8 a) Calculate the conductivity of your material.…

A: *We'll answer only the first three sub-parts since the sub-parts to be answered were not specified.…

Q: How long is a tungsten wire if it has a diameter of 0.195 x 10-3 m and a resistance of 3.33 k2? The…

A:

Q: A conductor is 6.00 cm long. If the material has a conductivity of 2.00 x 10^-2 Ω•m, then what must…

A:

Q: Two different wires, of the same cross-sectional area, are connected in series as part of a circuit.…

A: Required : Part (a)  If the electric field in wire 1 is E1, and the electric field through wire 2 is…

Q: What is the resistance of a 3.4-m length of copper wire 1.8 mm in diameter? The resistivity of…

A:

Q: 1. A 12' hollow tungsten rod has a cross-sectional area illustrated below. At 150°C, the resistance…

A: GIven the information Length of the hollow tungsten rod = 12 ft Resistance of the tungsten rod at…

Q: A 0.870-mm-diameter silver wire carries a 30.0 mA current. Part A What is the electric field in the…

A:

Q: The resistivity of gold at room temperature is 2.35 x 10-8 ohm-m. The temperature coefficient alpha…

A:

Q: A disk of thickness d and radius b has a hole at the center of radius d. If you know that the…

A:

Q: Material=Nickel  Resistivity=6.99 x 10^(-8) Ω.m a) Calculate the conductivity of your material.…

A: Since you have asked multiple subparts, we will solve the first three for you. If you want a…

Q: Problem 1. A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 41.O N at…

A: solution as

Q: A cylindrical conductor has resistance of R0 = 120 Ω. It has length L, radius of the cross section…

A:

Q: What is the equivalent resistor between the terminals a and b if you replace R1 by 20 Ohm and R2 by…

A: Given: The diagram is as follows: Introduction: Resistance is a measure of the opposition to…

Q: Shown below is a copper wire with the following characteristics: Diameter: 1.45 mm.00145m 1.45 ×…

A:

Q: The lengths of two conductor wires made of different materials are L1-2L2 and The resistors are…

A: The relation between resistance and resistivity is given byR = r×LA where R is resistancer is…

Q: A 2 0 resistor, a 10 N resistor, and a 15 N resistor are connected in parallel across a 12 V…

A:

Q: In an experiment, the current through a wire is 0.20O A and the voltage across the wire is 0.800 V.…

A: The voltage across the wire is equal to the product of current and resistance.

Q: The resistivity of a metal increases slightly with increased temperature. This can be expressed as…

A: Given, temprature coefficient of resistivity, α=3.9×10-3 °C value of reference temperature,T∘=20°…

Q: A platinum resistance thermometer (PRT) is a transducer which measures temperature 0 by means of…

A:

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

A:

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.