Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 25, Problem 42P
(a)
To determine
The length of 14-gauge copper wire
(b)
To determine
Current in the wire
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Chapter 25 Solutions
Physics for Scientists and Engineers
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- A 60 W lightbulb typically has a current of 0.50 A flowing through it. Calculate (a) the number of electrons passing a cross section of the bulb’s filament each second and (b) the number that pass the section in 1 h.arrow_forwardA circuit made up of 6 resistors is shown in the figure, with resistances R1 = 11 N, R2 = 65 Q, R3 = 38 Q, R4 = 69 N, R5 = 85 Q, and R6= 45 Q. The total current going through the circuit is I= 18 A. R, R4 a R3 R R, Re |Calculate the value of AV, in volts.arrow_forwardDuring open-heart surgery, a defibrillator can be used to bring a patient out of cardiac arrest. The resistance of the path is 500 Ω and a 10.0-mA current is needed. What voltage should be applied? If the current flows for a duration of 0.0100 s. How much charge moves?arrow_forward
- A heart defibrillator passes 12 A of current through a patient's torso for 3×10-3 s to restore normal beating of the heart. (a) How much charge passed through the patient's body? (b) What voltage was used if a total energy of 300 J was dissipated by the current? (c) Estimate the resistance of the electrical path through the person. State any assumptions made in answering this question.arrow_forwardCurrents up to 30 A can be carried by 10 gauge copper wire. (a) What is the resistance of 80 m of 10 gauge copper wire? 0.255 Ω (b) What is the electric field in the wire when the current is 30 A? 95.62 mv/m (c) How long does it take for an electron to travel 80 m in the wire when the current is 30 A? 9.75e-3 X Sarrow_forward(a) The resistance between two well-separated points on the human body is about1.5 x 10. If a potential difference of 120 V is applied across these points, how much current is generated? (b) If the skin is wet, the resistance drops to 5.0 x 10. What will the current be in this case for an applied potential difference of 120 V?arrow_forward
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