Aluminum, copper, gold, and nichrome wires of equal lengths of 1.0  10-1 meter and equal cross-sectional areas of 2.5  10-6 meter2 are at 20.0°C. Which wire has the greatest electrical resistance?

Q: A gold resistance thermometer has a resistance Ro = 70.0Ω at To = 20°C. The temperature coefficient…

A: SOlution: given that  Ro = 70.0Ω To = 20°C Temperature coefficient of resistance is 3.4x10-3°C R…

Q: A thermometer made of Platinum has a resistance of 50 2 at 20 C, what is the measured temperature…

A: Given data: Radius R=19.8 cm=0.198m Dielectric constant k =2.16

Q: A thermometer made of Platinum has a resistance of 50 at 20 C, what is the measured temperature (in…

A:

Q: A toaster has a Nichrome (a=4.5×104 °C-) heating element that has a resistance of Ro= 80 2 at a…

A: The relation between the resistance and the temperature is given by, Here, R, Ro, T, To and α…

Q: A toaster has a Nichrome (a-4.5 10 C) heating element that has a resistance of Ro 80 at a…

A:

Q: Electric field through a copper wire is found to be 0.18 V/m. If the copper wire has 8.46x102…

A: Drift velocity is the average velocity at which electrons move through a conductor under the…

Q: A length of aluminum wire has a resistance of 14.00 at 32.0°C. When the wire is warmed in an oven…

A:

Q: A common flash focus is rated at 310 mA and 2.90 V, the respective current and voltage values under…

A: Current is Voltage is Resistance of filament at temperature  is The coefficient of expansion for…

Q: A certain lightbulb has a tungsten filament with a resistance of 22.4 N when at 20.0°C and 143 N…

A:

Q: A platinum resistance thermometer has resistances of 210.0 2 when placed in a 0°C ice bath and 234.8…

A: Given information: The resistance of platinum thermometer when placed at 0 oC, R1=210.0 Ω  The…

Q: 13-V storage battery delivers current at the rate of 59 A. In a 25 min period, the heat lost from…

A:

Q: A spool of copper wire 290 m long and with a diameter of 0.480 mm is at 20.0°C. For copper, the…

A: Given value--- length = 290 m. diameter = 0.48 mm. initial temperature = 20 degree C.  resistivity…

Q: What is the resistance of a 21-cm-long column of blood in a 0.80-cm- diameter femoral artery? The…

A:

Q: The internal energy of the water in a container is increased by 440 kJ by means of an electric…

A:

Q: The rear window of a van is coated with a layer of ice at 0°C. The density of ice is 917 kg/m³, and…

A: Answer : 0.25mm Solution -

Q: To what temperature must you raise a gold wire (c = 0.0034), originally at 20.0°C, to double its…

A:

Q: A physics student is studying the effect of temperature on the resistance of a current carrying…

A:

Q: A 2.0 cm long tungsten filament in a florescent light bulb has a radius of 0.3 mm. Assume constant…

A: A 2.0 cm long tungsten filament in a florescent light bulb has a radius of 0.3 mm. cross sectional…

Q: Two cities separated by 10,000 ft is connected by telephone wires whose thermal coefficient of…

A: distance between two cities (d) = 10000 ft thermal coefficient of resistance (α) = 0.0003 per degree…

Q: A typical flash bulb is rated at 310 mA and 2.90 V, the respective values of current and voltage…

A: Page 1

Q: The measurable resistance of a wire with a length of 2.4 m and a vertical cross section of 0.03 cm2…

A:

Q: A toaster has a Nichrome (oa-4.5x10 °C) heating element that has a resistance of Ro- 80 2 at a…

A: Given: Temperature coefficient of resistance of given wire: α=4.5×10-4 [°C-1] Initial resistance of…

Q: Which of the following are parameters that determine the characteristics of the wave?

A: Required  Correct option

Q: Aluminum has 62% of copper conductivity but is just 30% the weight of copper. Show that this means…

A:

Q: Two cylindrical resistors Ri and R2 made from the same material are connected in parallel in a…

A:

Q: Given the following: Material: -copper Coefficient a (1/°C): -3.9x10^-3 Material: Constantan (Cu,…

A:

Q: Digital thermometers often make use of thermistors, a type of resistor with resistance that varies…

A: The resistance variation with the temperature is given by  R = Ro(1 + α ∆T) where, Ro is the…

Q: A copper wire is 10 cm long and has a cross-sectional area of 0.4 mm^2 and the resistance of the…

A:

Q: Digital thermometers often make use of thermistors, a type of resistor with resistance that varies…

A: Given that, Resistance at 00 C is 68.2 ohms and at 5290C it is 224 ohms. We need to find the…

Q: 1. A 12' hollow tungsten rod has a cross-sectional area illustrated below. At 150°C, the resistance…

A: GIven the information Length of the hollow tungsten rod = 12 ft Resistance of the tungsten rod at…

Q: A thermometer made of Platinum has a resistance of 50 N at 20 C, what is the measured temperature…

A:

Q: Silver at room temperature is found to have a resistivity of 1.59×108 №∙m. If the temperature i…

A: The resistivity which determines the resistance of a material to the flow of electric current will…

Q: The electrical resistance in ohms of a certain thermometer varies with temperature according to the…

A: R = R0  [1 + α (T – T0 )] . . . . . . . . . . . (1)Here, R0 and T0 are the initial resistance and…

Q: A certain laboratory experiment requires an aluminum wire of length of 23.0 m and a resistance of…

A: Given data:  Length (L) = 23.0 m Resistance (R) = 2.20 Ω Resistivity (ρ) = 2.82×10-8 Ω.m Required:…

Q: resistance of 18.0 Ω at 16.0°C. When the wire is warmed in an oven and reaches thermal equilibrium,…

A:

Q: A toaster has a Nichrome (a=4.5×10-4 °C¯-l) heating element that has a resistance of Ro= 80 Q at a…

A:

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.