At 20°C, the resistance of a sample of nickel is 525 Ω. What is the resistance when the sample is heated to 70°C? Let a = 0.005866 at 20°C.
At 20°C, the resistance of a sample of nickel is 525 Ω. What is the resistance...
At 20°C, the resistance of a sample of tungsten is 2.2 k Ω. What is the resistance of a sample when it is cooled to -10°C? Let a = 0.004403 at 20°C.
(1 point) 8. At 20°C, a length of copper wire has a resistance of 5.0 Ω What is its resistance when the wire is heated to 80°C? Let α-0.004 at 20°C 01.2Ω 07.5 Ω 06.2 Ω 010 Ω
At 20°C, a length of copper wire has a resistance of 5.0Ω. What is its resistance when the wire is heated to 80°C? Let a = 0.004 at 20°C.
The resistance of a certain copper power line is 100 Ω at 20°C. What is the resistance when the sun heats up the line to 38°C? The inferred absolute temperature “Ti” of copper is -234.5°C.
The resistance of a certain copper power line is 100 Ω at 20°C. What is the resistance when the sun heats up the line to 38°C? The inferred absolute temperature “Ti” of copper is -234.5°C.
6 At20 C, alength ofcopper wire has a resistance of 5 0 Ω What is its resistance when the wire ts heated to 80°C?It α-0004 at 200C. apoie) 01,2 Ω 07.5 Ω 0 622 10Ω 7. During a random lightning strike from a cloud to the ground, a current of 25,000 A lasts for 40 ( poin) ps. How much charge is transferred from the cloud to earth during that strike? 020 C 1.6C 0 10 C 2.5 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 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.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 152 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 124 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.