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 Resistive Heater. You and your team are designing a small tube heater that consists of a small…

A: The resistance of a wire is given by the formula R = ρ L / A, where R is the resistance, ρ is the…

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 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: The resistance of the tungsten filament of an incandescent light bulb at 24 degC is 32 Ohms. If the…

A: Given:The resistance of the tungsten filament at T1=20°CResistance,R1=32ΩVoltage,V= 130…

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

A: Write the equation of Ohm’s law and substitute the required values to determine the value of…

Q: A wire with a radius of 7.72mm is made of a conducting material that has an atomic mass of 49.4…

A: the formula that will be used here isI=neAvdA is area e is charge of electronvd is drift velocityI…

Q: busbar made out of copper has a length of 12 inches. Its surface dimension is 1 cm by 1 cm. If the…

A: Given values:-  Length of copper,(L)=12 inch=12 x 0.0254 m=0.3048 m ----(1) [Using 1 inch=0.0254 m]…

Q: 2. a) The resistivity of copper is 1.7241 x 10-8 (-m) at 20°C. What is the conductivity of copper at…

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 resistance of the tungsten filament of an incandescent light bulb at 22 degC is 34 Ohms. If the…

A: Given, R0=34 ohms at 220 CVoltage V =126 Vand current I =0.36 A

Q: Given the electric field through a write is 0.50 V/m. The material used to make the wire has…

A: The drift velocity of electrons is the average speed at which electrons move through a conductor…

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

A:

Q: A 3.5m long wire with a radius of 22.0mm has a resistance of 29.1ohms at 20degreesC. If its…

A: Given data: Length of the wire is, L = 3.5 m The radius of the wire is, r =22 mm= 0.022 m Initial…

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 certain laboratory experiment requires an aluminum wire of length of 31.0 m and a resistance of…

A: To calculate the diameter of the wire required. Given:length of wire: l=31.0 mresistance of wire:…

Q: In an experiment, the current through a wire is 0.20O A and the voltage across the wire is 0.800 V.…

A: The voltage across the wire is equal to the product of current and resistance.

Q: Iron has a resistivity of 9.71×10° Nm at 20°C. What will the resistivity of Lead when then…

A: We have given Resistivity at 20oC is   ρo= 9.71× 108 Ω.m Initial temperature To = 20oC  Final…

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.