Homework Answers
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(1) is correct resistivity will be same of both the wires because
they are made of same material and the current in 1st will be more
because its resistance is small from other one.
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Consider two pieces of copper wire that are the same length but A1 = 3A2. The...
Two pieces of 14-gauge wire (diameter=0.163cm) each are 50m in length. One wire is made of...
Two pieces of 14-gauge wire (diameter=0.163cm) each are 50m in
length. One wire is made of aluminum, the other of tungsten; both
are maintained at a temperature of 20°C. The wires are joined
together at one end to form a sign wire of 100m length. A potential
difference of 12V is applied across the length of this compound
wire. (a) What is the resistance of each 50m segment? (b) What is
the current in each? (c) What is the potential...
A 14.0-m length of wire consists of 6.0 m of copper followed by 8.0 m of...
A 14.0-m length of wire consists of 6.0 m of copper followed by 8.0 m of aluminum, both of diameter 1.1 mm . A voltage difference of 95 mV is placed across the composite wire. The resistivity of copper is 1.68×10−8Ω⋅m and the resistivity of aluminum is 2.65×10−8Ω⋅m. Part A) What is the total resistance (sum) of the two wires? Express your answer to two significant figures and include the appropriate units. Part B) What is the current through the...
Two pieces of wire arc soldered together and connected to a battery as shown. Each piece...
Two pieces of wire arc soldered together and connected to a battery as shown. Each piece has the same diameter and length, but the second piece is made of a material whose resistivity is three times larger than the first. (a.) What is the ratio of the current flowing through the first piece to the current flowing through the second piece? Explain. (b.) What is the ratio of the potential difference across the first piece to the potential difference across...
At the same temperature, two wires made of pure copper have different resistances. The same voltage...
At the same temperature, two wires made of pure copper have different resistances. The same voltage is applied at the ends of each wire. The wires may differ in Check all that apply. length. cross-sectional area. resistivity. amount of electric current passing through them
a.) A 33.9-m length of copper wire at 20.0°C has a radius of 0.31 mm. If...
a.) A 33.9-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.00 V is applied across the length of the wire, determine the current in the wire. b.) If the wire is heated to 40.0°C while the 7.00-V potential difference is maintained, what is the resulting current in the wire?
Two wires made of copper and aluminum have the same length and diameter. The wires are...
Two wires made of copper and aluminum have the same length and diameter. The wires are fused together end-to-end to form a single wire. A potential difference is applied to the ends of the wire by a battery so that current flows along the wire. What is the ratio of the electron drift velocity between the two metals, reported as ?
(a) A 35.3-m length of copper wire at 20.0°C has a radius of 0.31 mm. If...
(a) A 35.3-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in this table.) 1.48 A (b) If the wire is heated to 40.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire?
Problem 8 (5 pts): Consider two silver wires, one wire has 3 times the length and...
Problem 8 (5 pts): Consider two silver wires, one wire has 3 times the length and half the radius of the other. How do the resistivities of these two wires compare? A) The longer wire has 4/3 times the resistivity of the shorter wire. B) The longer wire has 3 times the resistivity of the shorter wire. C) Both wires have the same resistivity D) The longer wire has 3/4 times the resistivity of the shorter wire. Problem 9 (5...
(a) A 34.1-m length of copper wire at 20.0°C has a radius of 0.31 mm. If...
(a) A 34.1-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in the following table.) Resistivities and Temperature Coefficients of Resistivity for Various Materials (at 20°C) Material Resistivity (Ω · m) Temperature Coefficient of Resistivity [(°C)−1] Silver 1.59 ✕ 10−8 3.8 ✕ 10−3 Copper 1.7 ✕ 10−8 3.9 ✕ 10−3 Gold 2.44...
2) Two copper wires have the same voltage across them and the same length, but one...
2) Two copper wires have the same voltage across them and the same length, but one wire has twice the diameter as the other. How much power is dissipated in the wire with twice the diameter compared to the other wire?A) 1/4 as much B) 1/2 as much C) the same amount D) twice as much E) four times as much
Two pieces of 14-gauge wire (diameter=0.163cm) each are 50m in
length. One wire is made of aluminum, the other of tungsten; both
are maintained at a temperature of 20°C. The wires are joined
together at one end to form a sign wire of 100m length. A potential
difference of 12V is applied across the length of this compound
wire. (a) What is the resistance of each 50m segment? (b) What is
the current in each? (c) What is the potential...
Two pieces of wire arc soldered together and connected to a battery as shown. Each piece has the same diameter and length, but the second piece is made of a material whose resistivity is three times larger than the first. (a.) What is the ratio of the current flowing through the first piece to the current flowing through the second piece? Explain. (b.) What is the ratio of the potential difference across the first piece to the potential difference across...
(a) A 35.3-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in this table.) 1.48 A (b) If the wire is heated to 40.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire?
Problem 8 (5 pts): Consider two silver wires, one wire has 3 times the length and half the radius of the other. How do the resistivities of these two wires compare? A) The longer wire has 4/3 times the resistivity of the shorter wire. B) The longer wire has 3 times the resistivity of the shorter wire. C) Both wires have the same resistivity D) The longer wire has 3/4 times the resistivity of the shorter wire. Problem 9 (5...
2) Two copper wires have the same voltage across them and the same length, but one wire has twice the diameter as the other. How much power is dissipated in the wire with twice the diameter compared to the other wire?A) 1/4 as much B) 1/2 as much C) the same amount D) twice as much E) four times as much
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