16. The resistance of a copper wire at 30°C is 50 Q. If the temperature coefficient of copper at 0°C is 0.00427, what is the resistance at 100°C? O 72.26 Q 63.24 Q 54.25 Q 58.15 Q
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Q: 10) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its…
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Q: 2. What is the resistance at normal room temperature of 80 m of copper wire having a diameter of…
A: resistance of wire = resistivity×Length of the wirecross section of the wire
Q: Example 1.11. A copper conductor has its specific resistance of 1.6 x 10° ohm-cm at 0°C and a…
A: The solution can be achieved as follows.
Q: O A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its…
A: From the question, it is given that: Conductivity σ=98%Temperature T=20°CWe know that the…
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A: First we convert all units in SI units .then we will find out resistance from resistance formula .
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Q: If the resistance of a copper wire is 50 N at 20°C, what is its resis- tance at 100°C (boiling point…
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Q: 3- For a (1 kQ) copper composition resistor with a temperature coefficient at (20°C) 0.00393,…
A: The solution can be achieved as follows.
Q: Find the conductance of a 500 ft long #12AWG wire made up of copper
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A: Solution: If temperature increases thermal Velocity if free electrons also increases.
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Q: the resistivity of a conductor ranges in giga ohm Select the correct response: O True O False
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Q: the resistance of a copper wire at 30 c is 50 ohms. if the temperature coefficient at 0 c is…
A: Answer : The given parameters are as follows :- R30°=50 Ω temperature coefficient (α) = 0.00427…
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A: In this question we will find temperature coefficient of resistance...
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A: In this question we will find temperature coefficient of resistance....
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A: Given data, R1 = 123.48 Ω. T1 = 1000 C. R2 = 100 Ω. T2 = 300 C.
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- 8. Liquids with solid impurities a) Have higher dielectrie strength b) Of large size have higher dielectric strength c) Have lower dielectric strength as compared to pure liquids d) None of the above 9. Peak to peak ripple is defined as a) the difference between average de voltage and peak value b) the difference between maximum and minimum de voltage c) the difference between maximum ac and average dc voltages d) the difference between ac (rms) and average de voltages 10. In a Cockroft-Walton circuit, input voltage 100 kV load current 25 mA, supply frequency 100 Hz, each capacitor 10 nF. The optimum no. of stages for maximum output voltage is a) 1 b) 2 c) 10 d) 35Determine the thermal coefficient of resistance of copper at 50°C, then use this value todetermine the resistance of copper wire at 170° if the resistance of this copper wire at 50°C is50ohms. The thermal coefficient of resistance of copper at O°C is 0.004264/C°We want to investigate how the field strength will be with air as dielectric and with steatite. A plate capacitor is placed in a 24 kV network between phase and ground. The relative permittivity of air is &=1 and for steatite &-6. The plate capacitor has area = 1m². The distance between the electrodes is 2 mm. Ep = 8.854-10-12 F/m A=1m² d=2mm a) Calculate the maximum field strength in the plate capacitor. (Answer: 9.8kV/mm) b) What is the capacitance of the capacitor if we use steatite? (Answer: C = 26.6nF)
- 10) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in un-cm? 11) The resistance of a copper at 30°C is 500. If the temperature coefficient of copper at 0°C is 0.00427. What is the resistance at 100°C?A two wires, one of Copper and the other of Nickel, if the resistance of the first is (12.7 Q), and the second is (11.6 0) at room temperature, at what temperature are their resistances equal? Note that the temperature coefficient of resistivity of Copper is (0.0039 C-1), and for Nickel it is equal to (0.006 C1).10) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in uQ-cm?
- a) A coil consist of 2000 turns of copper wire having a cross sectional area of 0.8mm?. The mean length per turn is 80 cm and the resistivity of copper is 0.02µN-m. Find the resistance of the coil and power absorbed by the coil when connected across 110V D.C supply.this is the ability of a material to conduct electricity a. impedane b. conductance c. reactance d. capacitanceWhich of the following is not true for ferromagnetic materials? Please choose one: a. High?mthey have value. b.Above the Curie temperature, they lose their non-linear properties. C. a fixedµrthey have value. D.The energy loss is proportional to the area of the hysteresis loop.
- A wire has a circular cross-section of radius r= 3.53 mm. The conductivity of the wire is 1x10^5 (Ohm, meter) and its lengthis 2m. The total resistance of the wire in Ohms is:O a. 0.51O b. 0.72ç. 0.26O d. 5136.07O e. 797497.60A coil has a resistance of 18 when it mean temp is from 20o C to 50o C. Find its mean temp rise when its resistance is 21 and the surrounding temp is 15o C. A potential difference of 250 V is applied to a copper field coil at a temp of 15o C and the current is 5A. What will be the mean temp of the coil when the current has fallen to 3.91 A, the applied voltage being the same as before.How temperature effect conductivity? Explain with the help of following equation. m e'n7'