The resistance of the platinum wire of a platinum resistance thermometer at the ice point is 5 2 and at steam point is 5.39 2. When the thermometer is inserted in a hot bath, the resistance of the platinum wire is 5.795 Q. Calculate the temperature of the bath.
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- hard time with this trying to understandA certain laboratory experiment requires an aluminum wire of length of 23.0 m and a resistance of 2.20 at 20.0°C. What diameter wire must be used? (The resistivity of aluminum at 20.0°C is 2.82 x 10-8. m.) Enter a number. differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. mmAn aluminum rod has a resistance of 1.585 2 at 23.0°C. Calculate the resistance of the rod at 136.00°C by accounting for the changes in both the resistivity and the dimensions of the rod. Round your answer to the nearest thousandth and write it in the answer section. For aluminum: Temperature resistance coeff. ¤f = 3.90 X 10-3 °C-1, length expansion coeff. a = 24.0 X 10-6 °C-1.
- A length of aluminum wire has a resistance of 18.0 Ω at 16.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 34.7 Ω. (a) Neglecting thermal expansion, find the temperature of the oven. °C(b) Qualitatively, how would thermal expansion be expected to affect the answer?When initially at 20°C, the power being supplied to a 553 Ohm resistor in a circuit is 7.20 W. Over time, the temperature of the resistor increase to 166°C. If the temperature coefficient of resistivity of the material composing the resistor is 3.23 x 10-3 °C-1, what power is supplied to the resistor at its operating temperature?A certain laboratory experiment requires an aluminum wire of length of 31.0 m and a resistance of 2.80 at 20.0°C. What diameter wire must be used? (The resistivity of aluminum at 20.0°C is 2.82 x 10-8. m.) mm
- A certain laboratory experiment requires an aluminum wire of length of 35.0 m and a resistance of 4.40 Ω at 20.0°C. What diameter wire must be used? (The resistivity of aluminum at 20.0°C is 2.82 10-8 Ω · m.) Answer in mmA platinum resistance thermometer (PRT) is a transducer which measures temperature 0 by means of consequent change of electrical resistance RT between its two terminals. Such a PRT has the following quadratic characteristic: RT=Ro [1+A0+BO^2] The PRT is calibrated so that its resistance is Ro = 100 Q at a reference temperature of 0 = 0°C. The coefficients have the following values: A = +4.0 x 10-3 °C-1 B = -5.0 x 10-6 oc-2 Determine sensitivity of this transducer at temperatures of +50 °C. Select one: O a. 0.45 Q/°C Ob. -0.45 Q/°C -0.35 Ω/ΟC d. 0.4 0/°C O e. 0.35 Q/°C O f. -0.4 0/PCA length of aluminum wire has a resistance of 36.0 2 at 24.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 51.5 22. (a) Neglecting thermal expansion, find the temperature of the oven. °℃ (b) Qualitatively, how would thermal expansion be expected to affect the answer?
- A length of copper wire (α = 0.004041 at 20o C) has a resistance of 5 ohms at 20 degrees Celsius. Calculate its resistance if the temperature were to increase to 50 degrees Celsius.Nichrome is an alloy used for making electric heater wires. A nichrome wire of diameter 0.50 mm is to be used for this purpose. In operating conditions, the temperature of the wire is 968 °C, and the power of the electric heater is 1.5 kW. The potential difference applied to the heater wire is 110 volts. What should be the resistance (in ohms) of the wire at room temperature (20°C)? Electrical resistivity of nichrome at 20°C= 1.0 x 10-6 Qm Temperature coefficient of resistivity = 0.4 x 10-3 C-11. Nichrome is a metal alloy that has a resistivity of 108 X 10Q m. a) What is the resistance of a nichrome wire of length 5.00 m and diameter 1.32 mm? b) If the wire in part (a) above is connected to a cell of emf 1.55 volts and it is found that a current of 365 mA flows, what is the Internal resistance of the cell?