At 45?C, the resistance of a segment of gold wire is 67 ?. When the wire...
At 45?C, the resistance of a segment of gold wire is 67 ?. When the wire is placed in a liquid bath, the resistance increases to 177 ?. The temperature coefficient is 0.0034 (?C)?1 at 20?C. What is the temperature of the bath? Answer in units of ?C.
Homework Answers
Temperature Change in Resistance
Rt = Ro(1 + ??T)
? is temperature coef in /
Temperature Change in Resistance
Rt = Ro(1 + ??T)
? is temperature coef in /
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At 45?C, the resistance of a segment of gold wire is 67 ?. When
the wire...
The temperature coefficient of resistivity for the metal gold is 0.0034 (C°)-1, and for tungsten it...
The temperature coefficient of resistivity for the metal gold is 0.0034 (C°)-1, and for tungsten it is 0.0045 (C°)-1. The resistance of a gold wire increases by 7.2 percent due to an increase in temperature. For the same increase in temperature, what is the percentage increase in the resistance in a tungsten wire?
A platinum resistance thermometer has a resistance of 200 Ω when placed in an ice 0◦C...
A platinum resistance thermometer has a resistance of 200 Ω when placed in an ice 0◦C bath and 232.6 Ω when immersed in a crucible containing a melting substance. What is the melting point of the substance? The temperature coefficient of the platinum is 0.00392 (◦C)−1 . The resistor was calibrated at a temperature of 20◦C. Answer in units of ◦C.
A platinum resistance thermometer has a resistance of 200 Ω when placed in an ice 0◦C...
A platinum resistance thermometer has a resistance of 200 Ω when placed in an ice 0◦C bath and 204.7 Ω when immersed in a crucible containing a melting substance. What is the melting point of the substance? The temperature coefficient of the platinum is 0.00392 (◦C)−1 . The resistor was calibrated at a temperature of 20◦C. Answer in units of ◦C.
The resistance of gold is 2.8 × ? at a temperature of 20°C. A gold wire,...
The resistance of gold is 2.8 ×
? at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14
cm long, carries a current of 600 mA. The power dissipated in the
wire is closest to:
A) 33 mW
B) 1.0 mW
C) 1.7 mW
D) 1.8 mW
E) 55 mW
A wire with a temperature coefficient of resistance (-0.0060/C) has a resistance of 5.64 at 20°...
A wire with a temperature coefficient of resistance (-0.0060/C) has a resistance of 5.64 at 20° and a second wire with a temperature coefficient of resistance (0.0064/C) has a resistance of 5.25 at 20°. At what temperature will the two wires have the same resistance? .
A platinum resistance thermometer has a re- sistance of 200 ohms. A platinum resistance thermometer has...
A platinum resistance thermometer has a re-
sistance of 200 ohms.
A platinum resistance thermometer has a resistance of 200 ohm when placed in an ice 0 degree C bath and 290.8 Ohm when immersed in a crucible containing a melting substance. What is the melting point of the substance? The temperature coefficient of the platinum is 0.00392 (degreeC)^-1 . The resistor was calibrated at a temperature of 20 degree C. Answer in units of degree C. A platinum resistance...
A wire of unknown composition has a resistance of 35.00 Ω when immersed in water at...
A wire of unknown composition has a resistance of 35.00 Ω when immersed in water at 20.0◦C. When the wire is placed in boiling water, its resistance rises to 47.60 Ω . Calculate the temperature coefficient of resistance.
Learning Goal: Examine the dependence of resistivity and resistance of a wire on temperature and how...
Learning Goal: Examine the dependence of resistivity and resistance of a wire on temperature and how it affects the potential difference across the terminals of the wire. Introduction: A current of 65 milli-amperes (mA) flows through a wire of length L= 1.7 meters long and diameter of d= 1.15 millimeters at a temperature of T0= 20 °C; the wire's resistivity at this temperature is ρ0= 5.33×10−8 Ω ∙ m. The temperature coefficient of resistivity of the material is α= 4.6×10−3/C°....
A length of aluminum wire has a resistance of 20.0 Ω at 30.0°C. When the wire...
A length of aluminum wire has a resistance of 20.0 Ω at 30.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 36.2 Ω. (a) Neglecting thermal expansion, find the temperature of the oven.
An aluminum wire has a resistance of 3.00 2 at 31.0°C. Determine its resistance (in 2)...
An aluminum wire has a resistance of 3.00 2 at 31.0°C. Determine its resistance (in 2) at 431°C. The temperature coefficient of resistivity for aluminum wire is 3.90 x 10-3 (°C)-1. (Assume that the temperature coefficient of resistivity was measured using the reference temperature 20°C.)
The resistance of gold is 2.8 ×
? at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14
cm long, carries a current of 600 mA. The power dissipated in the
wire is closest to:
A) 33 mW
B) 1.0 mW
C) 1.7 mW
D) 1.8 mW
E) 55 mW
A wire with a temperature coefficient of resistance (-0.0060/C) has a resistance of 5.64 at 20° and a second wire with a temperature coefficient of resistance (0.0064/C) has a resistance of 5.25 at 20°. At what temperature will the two wires have the same resistance? .
A platinum resistance thermometer has a re-
sistance of 200 ohms.
A platinum resistance thermometer has a resistance of 200 ohm when placed in an ice 0 degree C bath and 290.8 Ohm when immersed in a crucible containing a melting substance. What is the melting point of the substance? The temperature coefficient of the platinum is 0.00392 (degreeC)^-1 . The resistor was calibrated at a temperature of 20 degree C. Answer in units of degree C. A platinum resistance...
An aluminum wire has a resistance of 3.00 2 at 31.0°C. Determine its resistance (in 2) at 431°C. The temperature coefficient of resistivity for aluminum wire is 3.90 x 10-3 (°C)-1. (Assume that the temperature coefficient of resistivity was measured using the reference temperature 20°C.)
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