A 50.0 m long Aluminum wire has a diameter of 0.50 mm and is at 20.0°C. If it carries a current of 0.50 mA, (a) calculate the power delivered to it? (b) If the temperature is increased to 340°C and the potential difference across the wire remains constant, what is the power delivered?

Q: 6. The current-density magnitude in a certain circular wire is J = (2.90 × 1010 A/m4) r, where r is…

A: First we need to find amount of current flowing through the wire, So given by: J = 2.90*10^10*r^2 We…

Q: The current density on a copper wire is 1.15x10 A/m'. The radius of the copper wire is also 2.15 cm.…

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Q: The same potential difference is applied between the two ends of a copper and iron wire of the same…

A: Given:  Potential difference applied between ends of copper and iron wire are same. Resistivity of…

Q: Consider a portable electric blanket that runs on a 4.5 V battery. If you use copper wire with a 0,5…

A: The given data are: V=4.5 Vd=0.5 mm=0.0005 mP=20 Wρ=1.7×10-8 Ω.m

Q: A heart defibrillator is used to enable the heart to start beating if it has stopped. This is done…

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Q: Given that a current of I(t)= 12t²+4 (where t is in s) is flowing parallel to the axis of a…

A:

Q: The heating coil in a toaster is made of nichrome wire with a radius of 0.275 mm. If the coil draws…

A: Given data: Radius (r) = 0.275 mm = 0.275×10-3 m Current (I) = 8.40 A Voltage (V) = 120 V…

Q: A heart defibrillator is used to enable the heart to start beating if it has stopped. This is done…

A: Given data:  Current (I) = 12 A Voltage (V) = 25 V Time (t) = 3 ms = 0.003 s Required: The Energy…

Q: Given that a current of I(t)= 13t2+4 (wheret is in s) is flowing parallel to the axis of a…

A: Data Given ,  I(t) = 13t2 + 4 ( where , t is in s ) Radius of the cylinder ( r ) = 0.4 mm…

Q: A 5.50 m length of 1.9 mm -diameter wire carries a 780 mA current when 23.0 mV is applied to its…

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Q: An aluminum wire having a cross-sectional area equal to 3.50 x 10-6 m2 carries a current of 6.00 A.…

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Q: An iron wire has a cross-sectional area egual to 9.50 x 10-6 m2. Carry out the following steps to…

A: (a) From the periodic table, the molar mass of Iron is M = 55.85g/mol = 55.85 x 10-3 kg/mol

Q: A spool of tungsten wire 320 m long and with a diameter of 0.480 mm is at 20.0°C. For tungsten, the…

A: part a and b are solved so with the help of this we will solve part c .

Q: In a hypothetical fusion research lab, high temperature helium gas is completely ionized and each…

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Q: An aluminum wire having a radius of 7.53 mm and carrying a current of 86.2 mA is connected in a…

A: let the density of the electrons is denoted by n, the charge of electrons is denoted by e, the…

Q: Wires A and B, having equal lengths of 40.0 m and equal diameters of 2.94 mm, are connected in…

A: As per guidelines, only 3 subparts are solved here. Given, Length of wire A = 40m Length of wire B =…

Q: The wiring in a house must be thick enough so it does not become so hot as to start a fire. What…

A: Given that Maximum current through wire = 35 A Maximum power dissipated in wire = 1.5 W Now we know…

Q: A 420 W vacuum cleaner is designed to operate at 120 V. What current does it draw? O3.5 A O3.0 A…

A: Given Power P = 420 W Voltage V = 120 V

Q: A high-voltage copper transmission line with a diameter of 1.40 cm and a length of 120 km carries a…

A:

Q: 1. What current flows through a 0.50 mm diameter rod of Aluminum that is 20.0 cm long, when 22 V is…

A: Resistance=ρLA A= π r2 = 1.96x10-7 m2 Resistance = 0.027 ohm

Q: A coil of Nichrome wire is 25.0 m long. The wire has a diameter of 0.400 mm and is at 20.0°C. If it…

A:

Q: The heating coil in a toaster is made of nichrome wire with a radius of 0.300 mm. If the coil draws…

A:

Q: In the United States, the National ElectricCode sets standards for maximum safe currents in…

A: Let the safe current be I, the resistance of the wire be R, and the length of the wire be L. a) For…

Q: A copper wire is 2.50 m long and has a diameter of 2.5 mm. How much current will it draw when…

A: Given: Diameter of wire d = 2.5 mm = 2.5*10-3 m length of wire l = 2.50 m voltage across wire V =…

Q: A 12 gauge copper wire has a cross sectional area of 3.31 x 10-6 m2. What is the drift velocity of…

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Q: An iron wire has a cross-sectional area equal to 4.00 x 10-6 m2. Carry out the following steps to…

A:

Q: A coil of Nichrome wire is 25.0 m long. The wire has a diameter of 0.400 mm and is at 20.0°C. If it…

A:

Q: A copper wire is 2.50 m long and has a diameter of 2.5 mm. How much current will it draw when…

A: Given data: The length of the copper wire is, L = 2.50 m The diameter of the copper wire is, D =2.5…

Q: An 18 gauge copper wire(the size usually used for lamp cords), with a diameter of 1.02 mm, carries a…

A: Given data: Diameter (d) = 1.02 mm = 1.02 × 10-3 m Current (I) = 1.67 A Free electron density (n) =…

Q: A cylindrical resistor of radius 3.0 mm and a length of 3.0 cm has a resistivity of 2.6 x 10-3 Ωm.…

A:

Q: A coil of Nichrome wire is 22.0 m long. The wire has a diameter of 0.340 mm and is at 20.0°C. (a) If…

A: The given values are,

Q: A 14-gauge copper wire has a diameter of 1.508 mm. What magnitude current flows in amperes when the…

A:

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

A:

Q: Wires A and B, having equal lengths of 40.0 m and equal diameters of 2.94 mm, are connected in…

A: Given length of wire A = length of wire B = 40 m diameter of wire A = diameter of wire B = 2.94 mm…

Q: Consider a portion of a cell membrane that has a thickness of 7.50 nm and 1.4 µm × 1.4 µm in area. A…

A: ConceptR=ρLAl=VRl=VAρL                l α A                     ρ=resistivity

Q: A lightbulb in a home is emitting light at a rate of 120 watts. If the resistance of the light bulb…

A: Given data:  Power (P) = 120 W Resistance (R) = 15.0 Ω Required: Current (I)

Q: Taking R = 1.50 kΩ and ε = 150 V in the figure shown below, determine the magnitude and direction of…

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Q: Given that a current of I(t)= 5t2+4 (where t is in s) is flowing parallel to the axis of a…

A: Given : Current=I(t)=5t2+4 t=5.9s Radius=r=0.2 mm=0.2x10-3 m Length=l=50 cm=0.5 m We have to find…

Q: A high voltage transmission line of diameter 3.73 cm and length 3.76189 km carries a steady current…

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Q: A copper transmission cable 19 km long and 18.9 cm in diameter carries a current of 43 A. How much…

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Q: T A 2.0 × 10²-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of…

A: The drift speed of the electrons can be calculated by , I = nqvdA, n = 8.5 x 1028  / m3 , q = 1.6 x…

Q: An aluminum wire having a cross-sectional area equal to 3.00 x 10-6 m² carries a current of 3.00 A.…

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Q: A high voltage transmission line of diameter 2.09 cm and length 4.9017 km carries a steady current…

A:

Q: A well-insulated electric water heater warms 107 kg of water from 20.0°C to 41.0°C in 29.0 min. Find…

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Q: A spool of aluminum wire 290 m long and with a diameter of 0.360 mm is at 20.0°C. For aluminum, the…

A: Given: L=290md =0.360mm = 0.360*10-3 mT1 = 20°Cρo=2.82*10-8 Ωmα=3.90*10-3 °C-1I=0.600A

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.