Homework Answers
Concept - use the geometrical definition of a resistance to find the resistance of the two wires and compare them to find the solution as shown below
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3. Copper wire #1 has a length L and a radius b. Copper wire #2 has...
"0000" gauge copper wire has a cross-sectional radius of 2.6cm. The resistivity of copper is 1.72...
"0000" gauge copper wire has a cross-sectional radius of 2.6cm. The resistivity of copper is 1.72 times 1-8ohmm. The circumference of the earth at the equator is 4.0 times 107m. What is the resistance of a piece of "0000"gauge wire that has been wrapped around the earth at the equator? 1200 ohm 840 ohm 320 ohm 0.032 ohm 0.084 ohm Select the following statement which is true about current flow. Select One of the Following: Current flows along lines of...
Two copper wires have the same length but different cross sectional areas. The cross-sectional area of...
Two copper wires have the same length but different cross sectional areas. The cross-sectional area of wire 1 is A, and that of wire 2 is 2A. How are the resistances of the two wires related? Choose the correct answer from the following choices. Wire 1 has four times the resistance of Wire 2 Wire 1 has half the resistance of Wire 2 The are the same. Wire 1 has twice the resistance of Wire 2
A wire of length L and radius r has a resistance R. If the length and...
A wire of length L and radius r has a resistance R. If the length and radius of this wire are doubled, the new resistance: remains the same. doubles. quadrables. drops to 1/2 its original value. drops to 1/4 its original value.
One copper wire has a cross sectional area of A and resistance R and length L....
One copper wire has a cross sectional area of A and resistance R and length L. A second copper wire has a length L and cross-sectional area 2A. What is the resistance of the second wire in terms of R? R/2 R 2R 4R Some other value
Which of the following is the correct statement regarding resistance? a. the resistance of a wire...
Which of the following is the correct statement regarding resistance? a. the resistance of a wire is inversely proportional to the resistivity of the wire b. the resistance of a wire is directly proportional to the length of the wire c. the resistance of a wire is directly proportional to the area of the wire d. all of the above statements are correct e. none of the above statements are correct Consider two copper wires. One wire has twice the...
Problem #2. A plastic core of length L and radius "a" has a long copper wire w nes. After N turns...
Problem #2. A plastic core of length L and radius "a" has a long copper wire w nes. After N turns of wire, the outer radius of the coil is -4a". Te on top of itself, making the radius gradually bigger.) Assume the crwire. (20 pts) together tightly and uniformly. A current 1- is then run through the wire keeps wrapping r wires are packed A) Show a calculation of the magnitude of the magnetic field on the as' Law)...
A copper wire of length L and cross-sectional area A has a resistance of R0. What...
A copper wire of length L and cross-sectional area A has a resistance of R0. What is the resistance of another copper wire with length 6L and cross-sectional area 2A. Give your answer as a multiple of R0. A 18.00 R0 B 0.33 R0 C 6.00 R0 D 3.00 R0 E 1.50 R0
Physics with Cal 2 A copper wire has radius of 0.2 cm and length of 400n...
Physics with Cal 2
A copper wire has radius of 0.2 cm and length of 400n m, what is the resistance of this copper wire? When a 200-V potential difference is applied over the wire, what is the current through the wire and what is the electric power? If the current is uniformly distributed, what is the current density? If the drift speed is 10 m/s, what is the number density of electrons in the wire? (Given copper's resistivity as...
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
A 62.5 m length of insulated copper wire is wound to form a solenoid of radius...
A 62.5 m length of insulated copper wire is wound to form a solenoid of radius 2.3 cm. The copper wire has a radius of 0.51mm. (Assume the resistivity of copper is ρ = 1.7 ✕ 10−8 Ω · m.) (a) What is the resistance of the wire? Ω (b) Treating each turn of the solenoid as a circle, how many turns can be made with the wire? turns (c) How long is the resulting solenoid? m (d) What is...
"0000" gauge copper wire has a cross-sectional radius of 2.6cm. The resistivity of copper is 1.72 times 1-8ohmm. The circumference of the earth at the equator is 4.0 times 107m. What is the resistance of a piece of "0000"gauge wire that has been wrapped around the earth at the equator? 1200 ohm 840 ohm 320 ohm 0.032 ohm 0.084 ohm Select the following statement which is true about current flow. Select One of the Following: Current flows along lines of...
A wire of length L and radius r has a resistance R. If the length and radius of this wire are doubled, the new resistance: remains the same. doubles. quadrables. drops to 1/2 its original value. drops to 1/4 its original value.
Problem #2. A plastic core of length L and radius "a" has a long copper wire w nes. After N turns of wire, the outer radius of the coil is -4a". Te on top of itself, making the radius gradually bigger.) Assume the crwire. (20 pts) together tightly and uniformly. A current 1- is then run through the wire keeps wrapping r wires are packed A) Show a calculation of the magnitude of the magnetic field on the as' Law)...
Physics with Cal 2
A copper wire has radius of 0.2 cm and length of 400n m, what is the resistance of this copper wire? When a 200-V potential difference is applied over the wire, what is the current through the wire and what is the electric power? If the current is uniformly distributed, what is the current density? If the drift speed is 10 m/s, what is the number density of electrons in the wire? (Given copper's resistivity as...
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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