A cylindrical wire has a radius r and length ℓ. If both r and ℓ are doubled, does the resistance of the wire (a) increase, (b) decrease, or (c) remain the same?

Q: Three wires of cross sectional area 3mm2, 4mm2 and 5mm? are made up of the same material and have…

A: 5mm2 area of cross section wire.

Q: Four identical wires, each of diameter d and length L are connected in parallel. The combination has…

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Q: The rod in the Figure shown below is made of a conductor. It has a square cross section 5.0 mm on a…

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Q: Calculate the currents i and iz in the circuit below. R1 i,t R, Ɛ1 = 12 V E2 = 9 V R1 = 70 Q R3 = 30…

A: We can redraw the circuit diagram as: We can solve for the values of current using Kirchoff's…

Q: A copper wire of 10 N and length L. At what point along its length must the wire be cut out so that…

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Q: What is the resistance of a wire made of a -8 material with a resistivity of 32x10 Q.m if its length…

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Q: The copper wires have the same cross - sectional area but different lengths. Wire Y is twice as long…

A: Given value--- same cross - sectional area . Wire Y is twice as long as wire X. We have to find---…

Q: A copper wire of 10 Q and length L. At what point along its length must the wire be cut out so that…

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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: Given: Diameter of conductor A = 1.5mm Inner Diameter of conductor B = 2.7mm Outer Diameter of…

Q: Consider two coaxial conducting spheres of radii a and b = 2a. Filled with a conductive material…

A: Given  P = p0(1+r/a) And  R = p*L/A

Q: In the circuit below, R1 = 202, R2 = 10 E, R3 = 10E, R4 = 202. Determine the equivalent resistance…

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Q: Three wires of lengths 3m, 4m and 5m are made up of the same material and have the same area of…

A: The expression for the resistance of the wire is    R=ρlA Here ρis the resistivity of the material,…

Q: What is the equivalent resistance between points B and A? Also find current of the resistor R1 when…

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Q: What is the resistance (in N) of a 4.5 m length of copper wire 1.5 mm in diameter? p=1.68x102-m…

A:

Q: A current, i(t) = 50 cos(100πt) enters the input terminal of an electric device. What is the charge…

A: Given Data, Charge at any instant "t" is i(t) = 50 cos(100πt) Time(t)= 5 ms At t=0 ,q=0

Q: + %3D %3D %3D 6.38 In Figure P.6.9, R1 = 100.0 2, R2 = 30.0 N, R3 = 10.0 N, and VB = 20.0 %3B R, B.…

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Q: A copper wire of 10 Q and length L. At what point along its length must the wire be cut out so tha…

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Q: Two conductors A and B are made of the same А B material and have the same length L and are a…

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Q: The graph below represents the relationship between the current in a metallic conductor and the…

A: The slope of current (I) vs potential difference (V) gives the value of . According to Ohm's law,

Q: Two aluminum wires have the same resistance. If one has twice the length of the other. What is the…

A: "Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: What is the resistance (in N) of a 4.5 m length of copper wire 1.5 mm in diameter? p=1.68x10 N-m…

A: given, length of wire l = 4.5 m (meter) diameter of wire = 1.5 mm = 1.5 x 10-3 m radius of wire =…

Q: Three wires of lengths 7m, 8m and 9m are made up of the same material and have the same area of…

A: SOlution: given that L1 = 7 m L2 = 8m L3 =9 m

Q: An electrical circuit consists of R1=12ohm, R2=12ohm, R3=3 ohm and R4=6ohm resistors as follows.…

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Q: Two metallic wires made from copper have same length but the radius of wire 1 is half of that of…

A: Radius of wire 1 is half the radius of wire 2 Let the radius of wire 1 be 'r', then the radius of…

Q: In the circuit shown, 3 Ω a www 5 Ω h V+ g b + 7 V 4 V + f C 2V + d 6Ω www 4Ω e Determine the…

A: R1 = 5 ohm R2 = 3 ohm R3 = 4 ohm R4 = 6 ohm V1 = 7 V V2 = 2 V V3 = 4 V V4 = 6 V

Q: A wire with length L and radius r has a resistance of R. A second wire made from the same material…

A: The equation for the resistance of the first wire is,

Q: A copper wire of 10 Q and length L. At what point along its length must the wire be cut out so that…

A: Given data, Resistance of wire R = 10 ohm Length of wire is L The resistance of the wire is…

Q: A rod of semiconducting material of lenght L=3 m and cross-sectional area A=4.5 mm^2 lies along the…

A: Ohm's law states that the current flowing through a conductor is directly proportional to the…

Q: A copper wire of 10 Q and length L. At what point along its length must the wire be cut out so that…

A: Given : Length of copper wire is L             Resistance of wire = 10 ohms

Q: Nine copper wires of length l and diameter d are connected in parallel to form a single composite…

A: Suppose that the diameter of each resistance is d. The equivalent resistance here is

Q: A rod of semiconducting material of length L = 4 m and cross-sectional area A = 3.5 mm² lies along…

A:

Q: A copper wire of radius r and length lhas a resistance of R. A second copper wire with radius 2r and…

A: The resistance is given by  R = ρLA where, L is the length and A is the area.

Q: Two wires have the same resistance and radius. If the wires are made of silver and iron with…

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Q: Three wires of lengths 3m, 4m and 5m are made up of the same material and have the same area of…

A: Resistance of a wire is given by formula ,  R = ρ L / A  Where ρ is resistivity of material of wire…

Q: Copper conductor has a radius of 2mm with current I=10A, If n= 8.48x1023 electron/m3 then the drift…

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Q: Two wires - A and B - with circular cross-sections have identical lengths and are made of the same…

A: Standard expression for the resistance of a wire (R) is given as, R=ρLA Here, ρ is the resistivity…

Q: A copper wire of 10 Q and length L. At what point along its length must the wire be cut out so that…

A: Given: Resistance of copper wire, R = 10 Ohms Length of the wire = L After cutting Resistor of wire…

Q: Two copper wires have the same volume, but wire 2 is 25 % longer than wire 1. The ratio of the…

A: The resistance of the first wire is, R1=ρL1A1=ρLπr12 The length of the second wire is,…

Q: The rod in the Figure shown below is made of a conductor. It has a square cross section 5.0 mm on a…

A: Area of the conductor  A = 5.0*5.0 mm2 Resistivity of the conductor = p = 2*10-3 ohm m  Length of…

Q: If the resistance of a conductor is doubled, the current gets halved. This is because: A) I = V - R…

A: Introduction: According to ohm's law, the voltage is directly proportional to the current on a…

Q: A rod of semiconducting material of length L = 4 m and cross-sectional area A = 3.5 mm2 lies along…

A: Given, L=4m A=3.5 mm2 V0=15+VL

Q: Three wires of lengths 3m, 4m and 5m are made up of the same material and have the same area of…

A: As seen from above, resistance is directly proportional to length of wire. Hence a long wire has…

Q: A hollow cylinder of length 2 m has its cross section as shown in Figure 5.18. If the cylin- der is…

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Q: Find (a) the equivalent resistance of the circuit in Fig- ure P28.60, (b) the potential difference…

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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.