Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Question
Chapter 25, Problem 3Q
To determine
The temperature at which the resistance of the coils be equal.
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A given copper wire has a resistance of 5.02 Ω at 20.0°C while a tungsten wire of the same diameter has a resistance of 4.61 Ω at 20.0°C. At what temperature will the two wires have the same resistance?____ °C
At 20°C, the carbon resistor in an electric circuit connected to a 6.2-V battery has a resistance of 3.0 ✕ 102 Ω. What is the current in the circuit when the temperature of the carbon rises to 76°C?
At 20°C, the carbon resistor in an electric circuit connected to a 5.7-V battery has a resistance of 2.7 ✕ 102 Ω. What is the current in the circuit when the temperature of the carbon rises to 90°C?
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Chapter 25 Solutions
Physics Laboratory Experiments
Ch. 25 - Prob. 1ASACh. 25 - Prob. 2ASACh. 25 - Distinguish between a positive and a negative...Ch. 25 - Are the of a metal conductor and the of a...Ch. 25 - What are the circuit conditions when a Wheatstone...Ch. 25 - Prob. 6ASACh. 25 - What is the value of for copper in terms of...Ch. 25 - Prob. 3QCh. 25 - Prob. 4QCh. 25 - Prob. 5Q
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Power P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?arrow_forwardAt 20.0°C, the carbon resistor in an electric circuit connectedto a 5.0 - V battery has a resistance of 2.0 x 102 Ω. What is thecurrent in the circuit when the temperature of the carbonrises to 80.0°C?arrow_forwardThe copper windings of a motor have a resistance of 50 ohm at 20°C when the motor is idle. After the motor has run for several hours, the resistance rises to 58 .What is the temperature of the windings now? Ignore changes in the dimensions of the windings.arrow_forward
- A copper wire has a resistance of 15.0 Ω at a temperature of 14°C. After a current passes through the windings, the resistance rose to 22.5 Ω. To what temperature was the wire heated?arrow_forwardWhen at 25 degrees Celsius, a certain resistor has a resistance of 220 Ohms. When connected to a 11.0 Volt power supply, the current in the circuit is measured to be 48.9 mA. What is the temperature of the resistor if its temperature coefficient of resistivity is 4.00 x 10^-3 per degree Celsius?arrow_forwardAt 20°C, the carbon resistor in an electric circuit connected to a 3.5-V battery has a resistance of 2.1 x 10² . What is the current in the circuit when the temperature of the carbon rises to 79°C? X 10.171arrow_forward
- Use a graph to find the resistance Ro at 0 °C and the temperature coefficient a, where the resistance R = Ro(1 + aT) for a sample of wire giving the following data: 2.4515 R(N) T (°C) 2.0700 2.1465 2.2225 2.2990 2.3740 10 20 30 40 50 60arrow_forwardA machine coil has a resistance of 46 ohms at 25 degrees celsius. Its temperature coefficient of resistance is 0.0045454 at 10 degrees celsius. At what temperature will its resistance be at 105 ohms?arrow_forwardA copper wire has a resistance of 15.0Ω at a temperature of 14°C. After a current passes through the windings, the resistance rose to 12°.5Ω. To what temperature was the wire heated?arrow_forward
- Nichrome wire (ρ = 150 x 10-8 Ω.m) of cross-sectional radius 0.156 mm is to be used in winding a heating coil. If the coil must carry a current of 2.35 A when a voltage of 220 V is applied across its ends, determine the length of wire you must use to wind the coil (remember to first find the required resistance of the coil). Give your answer in meters.arrow_forwardThe copper windings of a motor have a resistance of 46 Ω at 20oC when the motor is idle. After the motor has run for several hours, the resistance rises to 59 Ω. What is the temperature in Celsius of the windings now? Ignore changes in the dimensions of the windings. The temperature coefficient of resistivity for copper is 4.3 × 10-3 K-1.arrow_forwardA coil of copper wire has a length of 10 m. The cross sectional area of the wire is 0.2mm2. Note: Data for copper: Resistivity at 0oC 0= 1.59 x 10-8 Ωm Calculate the coil resistance at a temperature T=50 oCarrow_forward
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