A tungsten filament of 1 mm² with a length of 1.5 cm is used as a heating element. If the operating temperature is 2830°C, estimate the resistance of the filament at this temperature.
Q: If the 0.185 mm diameter tungsten filament in a light bulb is to have a resistance of 0.103 Ω at…
A: Given data: Diameter (d) = 0.185 mm = 0.185×10-3 m Resistance (R) = 0.103 Ω Resistivity (ρ) =…
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A: Given: R = mT1/2+nWhen T = 0° C, R = 4.8 ΩWhen T = 100° C , R = 9.3Ω
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Q: 17.2 A given copper wire has a resistance of 5.18 Ω at 20.0°C while a tungsten wire of the same…
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A: Consider the given data as below. Resistance of the filament, Ro=13.0 Ω Reference temperature,…
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A: Current, I = 20 μAResistance, R = 253 Ω
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Q: The density of mobile electrons in copper metal is 8.4 x 1028 m3. Suppose that / 4.7 x 1018…
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Q: Problem 20.03. For the following circuit, assume the battery has some internal resistance such that…
A: Given ε=20.0 V (emf of battery)R1=5*103ΩI1=3.60*10-3 A Cell equation is given by VT=ε-Irr=ε-VTI
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Q: Suppose that the resistance between the walls of a biological cell is 5.9 × 109 Ω. (a) What is the…
A: Given that:- Resistance between the walls of a biological cell=5.9×10^9 ohm
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Q: person notices a mild shock if the current along a path through the thumb and index finger exceeds…
A: V = IR
Q: In the figure R₁ = 92.0, R₂ R3 = 66.00, R₂ = 95.1 Q2, and the ideal battery has emf ε = 6.00 V. (a)…
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Q: If the 0.140 mm diameter tungsten filament in a light bulb is to have a resistance of 0.290 Ω at…
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Q: If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of 0.200 Ω at…
A: Given - Diameter of tungsten filament ,d = 0.100 mm =0.100 x 10-3 m Resistance of tungsten…
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Q: Suppose that the resistance between the walls of a biological cell is 5.7 × 109 Ω. (a) What is the…
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A: Given data: Resistance = R Initial temperature (T0) = 37.0°C Final temperature (T) = 53.8°C…
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Q: nce of 0.49 Ω at 20.0°C, and an iron wire has a resistance of 0.57 Ω at the same temperature. a)…
A: We know that we have given that the A copper wire has a resistance of 0.49 Ω at 20.0°C, and an iron…
Q: An aluminum rod has a resistance of 1.590 Ω at 20.0°C. Calculate the resistance of the rod at 102°C…
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- A wire has a diameter of D = 0.95 cm and is L = 5.5 m long. When connected to a V = 24 V source the wire passes a I = 35 A current. What is the wire's resistivity in Ω⋅m?(a) Of what material is a wire made, if it is 20.0 m long with a 0.110 mm diameter and has a resistance of 33.5 at 20.0°C? copper gold platinum silver (b) What is its resistance (in Q) at 140°C? 47.17If the 0.130 mm diameter tungsten filament in a light bulb is to have a resistance of 0.230 Ω at 20.0°C, how long should it be?
- A person notices a mild shock if the current along a path through the thumb and index finger exceeds 78 µA. Compare the maximum possible voltage without shock across the thumb and index finger with a dry-skin resistance of 3.0 ✕ 105 and a wet-skin resistance of 2000 . dry skin V wet skin VA portable coffee heater supplies a potential difference of 12.0 V across a Nichrome heating element with a resistance of 1.92 Ω. (a) Calculate the power (in W) consumed by the heater. W (b) How many minutes would it take to heat 1.13 kg of coffee from 20.6°C to 46.2°C with this heater? Coffee has a specific heat of 4184 J (kg · °C) . Neglect any energy losses to the environment. minSuppose you wish to fabricate a uniform wire out of 1.20 g of copper. If the wire is to have a resistance R = 0.690 Ω, and if all the copper is to be used, find the following. (a) What will be the length of the wire?m(b) What will be the diameter of the wire?mm
- The resistivity of blood is related to its hematocrit, the volume fraction of red blood cells in the blood. A commonly used equation relating the hematocrit h the blood resistivity ρ (in Ω⋅m) is ρ=1.32/(1−h)−0.79. In one experiment, blood filled a graduated cylinder with an inner diameter of 0.90 cm. The resistance of the blood between the 1.0 cm and 2.0 cm marks of the cylinder was measured to be 210 Ω. What was the hematocrit for this blood?A battery has an emf of 15.0 V. The terminal voltage of the battery is 10.8 V when it is delivering 26.0 W of power to an external load resistor R. (a) What is the value of R? (b) What is the internal resistance of the battery?The resistivity of axoplasm in a squid axon is 0.30 Ω · m. What is the length of a squid axon having a resistance of 2.2 × 105 Ω and a radius of 0.020 cm? (An axon, which is a long projection of a neuron cell, carries nerve impulses)