PHYSICS F/SCI.+ENGR.,V.1 (CHAP.1-20)
5th Edition
ISBN: 9780134378053
Author: GIANCOLI
Publisher: RENT PEARS
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Chapter 25.4, Problem 1FE
To determine
The number of times greater, if the resistance of the tungsten filament at its operating temperature than its resistance at room temperature.
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Students have asked these similar questions
(a) To what temperature must you raise a copper wire, originally at 20 °C, to double its resistance,
neglecting any changes in dimensions? Use a = 3.9×10
1
-3
O
Yes
No
O
T=
(b) Does this happen in household wiring under ordinary circumstances?
In order to double its resistance, by how much would you have to increase the temperature of a piece of the following?
(a) copper (The temperature coefficient of resistance for copper is 3.9 × 10-3 (°C)-¹.)
°C
(b) Nichrome (The temperature coefficient of resistance for Nichrome is 4.0 × 10-4 (°C)-¹.)
°C
The temperature coefficient of a certain conducting
material is 4.52 × 10-4 (°C)-¹. (a) At what temperature
would the resistance be 2 times the resistance at
20.0°C? (Use 20.0°C as the reference point in
P = Po = Poa(TTO).) (b) Does this temperature
hold for all copper conductors, regardless of shape or
size?
(a) Number i
(b) Yes
Units
°℃
Chapter 25 Solutions
PHYSICS F/SCI.+ENGR.,V.1 (CHAP.1-20)
Ch. 25.2 - If 1 million electrons per second pass a point in...Ch. 25.2 - Prob. 1BECh. 25.3 - Return to the Chapter-Opening Question, page 651,...Ch. 25.4 - Prob. 1DECh. 25.4 - Prob. 1EECh. 25.4 - Prob. 1FECh. 25.4 - How many 60-W 120-V lightbulbs can operate on a...Ch. 25.6 - Each channel of a stereo receiver is capable of an...Ch. 25 - What quantity is measured by a battery rating...Ch. 25 - When an electric cell is connected to a circuit,...
Ch. 25 - When a flashlight is operated, what is being used...Ch. 25 - One terminal of a car battery is said to be...Ch. 25 - When you turn on a water faucet, the water usually...Ch. 25 - Can a copper wire and an aluminum wire of the same...Ch. 25 - The equation P = V2/R indicates that the power...Ch. 25 - What happens when a lightbulb burns out?Ch. 25 - If the resistance of a small immersion heater (to...Ch. 25 - Prob. 10QCh. 25 - Explain why lightbulbs almost always burn out just...Ch. 25 - Which draws more current, a 100-W lightbulb or a...Ch. 25 - Electric power is transferred over large distances...Ch. 25 - A 15-A fuse blows repeatedly. Why is it dangerous...Ch. 25 - When electric lights are operated on low-frequency...Ch. 25 - Driven by ac power, the same electrons pass back...Ch. 25 - The heating element in a toaster is made of...Ch. 25 - Is current used up in a resistor? Explain.Ch. 25 - Compare the drift velocities and electric currents...Ch. 25 - A voltage V is connected across a wire of length l...Ch. 25 - Why is it more dangerous to turn on an electric...Ch. 25 - Prob. 1PCh. 25 - Prob. 2PCh. 25 - Prob. 3PCh. 25 - Prob. 4PCh. 25 - Prob. 5PCh. 25 - Prob. 6PCh. 25 - Prob. 7PCh. 25 - Prob. 8PCh. 25 - Prob. 9PCh. 25 - Prob. 10PCh. 25 - Prob. 11PCh. 25 - Prob. 12PCh. 25 - Prob. 13PCh. 25 - Prob. 14PCh. 25 - Prob. 15PCh. 25 - (II) A rectangular solid made of carbon has sides...Ch. 25 - (III) A hollow cylindrical resistor with inner...Ch. 25 - Prob. 63GP
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- A piece of Nichrome wire has a radius of 6.5 x 10-4 m. It is used in a laboratory to make a heater that dissipates 3.00×102 W of power when connected to a voltage source of 120 V. Ignoring the effect of temperature on resistance, estimate the necessary length of wire.arrow_forward1. (a) To what temperature must you raise a copper wire, originally at 21 °C, to double its resistance, neglecting any changes in dimensions? Use a=3.9×10-³ °C T= (b) Does this happen in household wiring under ordinary circumstances?arrow_forwardThe temperature coefficient of a certain conducting material is 4.78 × 10-3 (°C)-1. (a) At what temperature would the resistance be 3 times the resistance at 20.0°C? (Use 20.0°C as the reference point in ρ-ρ0=ρ0α(T-T0).) (b) Does this temperature hold for all copper conductors, regardless of shape or size?arrow_forward
- Two resistors, one having a resistance of 900 kΩ , are connected in series to produce a total resistance of(a) What is the value of the second resistance?(b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?arrow_forward1. (a) A certain conductor has a resistance of 10 ohms. It is placed between the poles of a cell whose potential is 5 volts. What current will pass through the conductor if the voltage remains constant at the value given? (b) How many coulombs of electricity will pass through the conductor if this current is maintained for 20 minutes? c) what will be the energy expended during this time interval?arrow_forward(25%) Problem 6: A copper wire has a resistance of 0.495 2 at 20.0°C, and an iron wire has a resistance of 0.535 2 at the same temperature. D A At what temperature, in degrees Celsius, are their resistances equal? The temperature coefficient of resistivity of copper is 3.9 x 10-3 (°C)-!, while that for iron is 5.0 x 10-3 (°C)-!. T = sin() cos() tan() 9 HOME cotan() asin() acos() E 4 5 6. atan() acotan() sinh() 1 3 cosh() tanh() cotanh() END O Degrees O Radians Vol BACKSPACE D CLEARarrow_forward
- A current of 3.70 A is carried by a 250 m long copper wire of radius 1.25 mm. Assume an electronic density of 8.47 x 10m, resistivity p = 1.67 x 10*2 · m, and resistivity temperature coefficient of a= 4.05 x 10-3 °C-1 at 20 °C. (a) Calculate the drift speed of the electrons in the copper wire. (b) Calculate the resistance of the at 35 °C. (c) Calculate the difference of potential between the two ends of the copper wire.arrow_forward(a) Digital medical thermometers determine temperature by measuring the resistance of a semiconductor device called a thermistor (which has α = – 0.0600 / ºC ) when it is at the same temperature as the patient. What is a patient’s temperature if the thermistor’s resistance at that temperature is 82.0% of its value at 37.0ºC (normal body temperature)?(b) The negative value for α may not be maintained for very low temperatures. Discuss why and whether this is the case here. (Hint: Resistance can’t become negative.)arrow_forwardA copper wire has a resistance of 0.375 2 at 20.0\deg C, and an iron wire has a resistance of 0.400 at the same temperature. At what temperature (in \deg C) are their resistances equal?arrow_forward
- Given that copper's temperature coefficient of resistivity is about 3.9 x 10-3 °C-!, to what temperature must you raise a copper wire originally at 18.9 °C in order to double its resistance? Neglect any changes in dimensions. temperature: °C Does this happen in household wiring under ordinary circumstances? yes O noarrow_forward9:27 (23) شهد قېل 6 دقائق What is the resistance (in units of a) of a wire made of a material with a resistivity of 3.2 x 100. m, if its length is 18.5 m and its diameter is 0.50 mm?arrow_forwardWhen a resistance of 100N is connected in series with a galvanometer of resistance R, its range is V. To double its range, a resistance of 1000 ohm is connected in series. What is the value of R ? (a) 800 2 (b) 900 2 (c) 100 N (d) 700 2arrow_forward
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