A carbon wire and a Nichrome wire are connected one after the other. If the combination...
A carbon wire and a Nichrome wire are connected one
after the other. If the combination has total resistance
of 7.0 k
at 20°C, what is the resistance of each wire
at 20°C so that the resistance of the combination does not change
with temperature?Nichrome wire kcarbon wire k
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A carbon wire and a Nichrome wire are connected one
after the other. If the combination...
For some applications, it is important that the value of a resistance not change with temperature....
For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 9 kΩ resistor from a carbon resistor and a Nichrome wire-wound resistor connected together so the total resistance is the sum of their separate resistances. The temperature coefficients of resistivity of carbon and Nichrome at 20∘C are -0.0005 (∘C)−1 and 0.0004 (∘C)−1, respectively. Express your answer to one significant figure and include the appropriate units. a.) What value...
A length of aluminum wire is connected to a precision 10.00-V power supply, and a current...
A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4212 A is precisely measured at 27.0 ∘C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3804 A . --------------------------------------------------------------------------------------------------------------------------------------------------- For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 4.00 −kΩ−kΩ resistor from a carbon resistor and a Nichrome wire-wound resistor connected...
stuck on these 2 questions 1. A resistor made of Nichrome wire is used in an...
stuck on these 2 questions 1. A resistor made of Nichrome wire is used in an application where its resistance cannot change more than 2.53% from its value at 20.0°C. What is the highest temperature at which this resistor can be reliably used? The temperature coefficient of resistivity for Nichrome is 0.4 ✕ 10−3 (°C)−1. 2. An electronic device designed to operate at any temperature in the range from −9.9°C to 78.7°C contains pure carbon resistors. What is the percent...
A thick copper wire 2.3 m long is connected in series to a thin high-resistance Nichrome...
A thick copper wire 2.3 m long is connected in series to a thin high-resistance Nichrome wire. In the steady state, the conventional current in the thick copper wire is 4 amperes. In this copper wire there are 8 � 1028 mobile electrons per cubic meter and the electron mobility is 4.5 � 10?3 (m/s)/(V/m). The cross-sectional area of the copper wire is 6 � 10?7 m2. The thin high-resistance Nichrome wire (which is connected in series to the thick...
A Nichrome heating element that has resistance 28.0? is connected to a battery that has emf...
A Nichrome heating element that has resistance 28.0? is connected to a battery that has emf 82.0V and internal resistance 1.6? . An aluminum cup with mass 0.130 kg contains 0.200 kg of water. The heating element is placed in the water and the electrical energy dissipated in the resistance of the heating element all goes into the cup and water. The element itself has very small mass. How much time does it take for the temperature of the cup...
A Nichrome heating element that has resistance 28.0 Ω is connected to a battery that has...
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A Nichrome heating element that has resistance 27.0 Ω is connected to a battery that has...
A Nichrome heating element that has resistance 27.0 Ω is connected to a battery that has emf 88.0 V and internal resistance 1.6 Ω . An aluminum cup with mass 0.130 kg contains 0.200 kg of water. The heating element is placed in the water and the electrical energy dissipated in the resistance of the heating element all goes into the cup and water. The element itself has very small mass. How much time does it take for the temperature...
A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is...
A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is first connected to a 140-V source of potential difference and the wire is at a temperature of 20.0°C), the initial current is 1.70 A, but the current begins to decrease as the resistive element warms up. When the toaster reaches its final operating temperature, the current has dropped to 1.53 A. (a) Find the power the toaster converts when it is at its operating...
A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is...
A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is first connected to a 130-V source of potential difference (and the wire is at a temperature of 20.0°C), the initial current is 1.70 A, but the current begins to decrease as the resistive element warms up. When the toaster reaches its final operating temperature, the current has dropped to 1.53 A. (a) Find the power the toaster converts when it is at its operating...
20837731 A certain toaster has a heating element made of Nichrome resistance wire. When the toaster...
20837731 A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is first connected to a 140-V source of potential difference (and the Initial current is 1.80 A, but the current begins to decrease as the resistive element warms up. When the toaster reaches its firal the wire is at a temperature of 20.0 c), final operating temperature, the current has dropped to 1.53 A a) Find the power the toaster converts when it is...
A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is first connected to a 140-V source of potential difference and the wire is at a temperature of 20.0°C), the initial current is 1.70 A, but the current begins to decrease as the resistive element warms up. When the toaster reaches its final operating temperature, the current has dropped to 1.53 A. (a) Find the power the toaster converts when it is at its operating...
20837731 A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is first connected to a 140-V source of potential difference (and the Initial current is 1.80 A, but the current begins to decrease as the resistive element warms up. When the toaster reaches its firal the wire is at a temperature of 20.0 c), final operating temperature, the current has dropped to 1.53 A a) Find the power the toaster converts when it is...
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