The magnitude J(r) of the current density in a certain cylindrical wire is given as a function of radial distance from the center of the wire’s cross section as J(r) = Br, where r is in meters, J is in amperes per square meter, and B =2.00 * 10^5 A/m3.This function applies out to the wire’s radius of 2.00 mm. How much current is contained within the width of a thin ring concentric with the wire if the ring has a radial width of 10.0 mm and is at a radial distance of 1.20 mm?

Q: An electric current in a conductor varies with time according to the expression I(t) = 100 sin…

A:

Q: A cylindrical conducting wire which is 173.67cm long, 45.65mm thick and resistivity of 7.70.m, (a)…

A:

Q: The beam, consisting of electrons with constant kinetic energy and uniform density, carries a…

A: Given : I = 1 mA = 0.001 A A = 23 mm2 = 23 x 10-6 m2 n = 3 x 1012 cm-3 = 3 x 1018 m3

Q: An iron wire with cross-section 3.4 x 106 m? carries current 169 A. Find the drift velocity Va, in…

A:

Q: How much current will be flowing through a 69m length of copper wire with radius 6.9mm if it is…

A:

Q: A copper conductor has a diameter of 12 inch and it is 148 feet long. Assume that it carriers a…

A: Diameter of conductor, d=12 inch =12 x(0.0254 meters) =0.3048 m Length of conductor =148 feet…

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: Consider two wires made of different materials. Wire A has a conductivity of 1.3 × 107 Ω-1m-1, and…

A:

Q: An electric current in a conductor varies with time according to the expression I(t) = 94 sin…

A: Given that,An electric current in a conductor varies with time according to the expression I(t) = 94…

Q: The magnitude J of the current density in a certain wire with a circular cross section of radius…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: The magnitude of the current density in a certain lab with a circular cross section of radius R=4.00…

A: Given: The radius is R=4 mm. The magnitude of the current density is J=3×108r2. The outer section…

Q: An iron wire with cross-section 1 × 10–6 m² carries current 195 A. Find the drift velocity Va, in…

A:

Q: In the Bohr model of the hydrogen atom, an electron in thelowest energy state moves at a speed equal…

A:

Q: 1. The magnitude J of the current density in a certain wire with a circular cross section of radius…

A:

Q: A 210-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,060 A.…

A:

Q: A long, straight, solid cylinder, oriented with its axis in the z−direction, carries a current whose…

A:

Q: The electron beam emerging from an accelerator has a circular cross section of radius 1 mm. If the…

A: Let r be the radius of the cross-section of the beam, I be the current, v be the speed. Write the…

Q: n iron wire with cross-section 3,7 * 10-6m2 carries current 168 A. Find the drift velocity Vd, in…

A: Given- Crosssection area  A=3.7×10-6 m2Current I=168 Amolar mass of iron m=55.845 uDensity ρ=7.874…

Q: A 200-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1 000…

A: The given values are,

Q: An iron wire with cross-section 3.2 x 10 m2 carries current 167 A. Find the drift velocity Va, in…

A:

Q: The electric field of the material between two coaxial cables of radius 0.525 cm and 0.675 cm is…

A: The current density of the material is, J=σE Here, σ is the conductivity of the material and E is…

Q: A wire of circular cross-section carries current density that is not uniform but varies with…

A:

Q: An electric current in a conductor varies with time according to the expression I(t) = 110 sin…

A: Solution:-current in conductor  is given by           It=110 sin90πtwe have to find total charge…

Q: The current in a wire varies with time t according to the relation: I(t) = 108–4t?. where the…

A:

Q: An iron wire with cross-section 3.1 × 10-º m² carries current 158 A. Find the drift velocity Va, in…

A: Given that cross section area of the iron wire and current and also given the two carriers per iron…

Q: current density through the cross section of the wires, greatest first.

A: Given data:   The current density is: J The length of cylindrical wire 1 is: l The length of…

Q: What is the current in a wire of radius R = 4.48 mm if the magnitude of the current density is given…

A:

Q: A 260-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,180 A.…

A:

Q: The current density in a cylindrical wire of radius R is given by J = Jo(1-). Density is parallel to…

A:

Q: t) = 5.66 cos( 2.3 t), in amperes, determine the total amount of charge, in coulombs, flowing…

A: The rate of flow of charge is called current.

Q: The quantity of charge (in C) that has passed through a certain surface area varies with time…

A: Given: The quantity of charge is given as,

Q: Figure represents a section of a circular conductor of Ag nonuniform diameter carrying a current of…

A: Current density is defined as the total amount of electric current travelling in per unit cross…

Q: A 411-km-long high-voltage transmission line 7.00 cm in diameter carries a steady current of 1,900…

A: For the high voltage transmision line following informations are given,Length: l=411kmDiameter:…

Q: In the SI system of units, one coulomb (1 C) is defined to be the charge that passes a point every…

A: Given,      I = 2 A      t = 5 min = 300 seconds

Q: In the Bohr model of the hydrogen atom, an electron in the lowest energy state moves at a speed of…

A: The time is,

Q: The student runs an experiment on a cylindrical wire of a length l of 2 centimeters and the cross-…

A:

Q: The figure below represents a section of a circular conductor of nonuniform diameter carrying a…

A: Given data: Current (I) = 4.00 A Radius of cross-section A1 r1 = 0.250 cm

Q: An iron wire with cross-section 2,9 × 10–6 m² carries current 144 A. Find the drift velocity Va, in…

A: In the tuition given the value of cross section area and current and we have to find the value of…

Q: The magnitude J of the current density in a certain wire with a circular cross section of radius R =…

A:

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: The current density in a cylindrical wire of radius 3R is given by J=J0 (1 - r2/R2). Density is…

A: The current density of the cylinder is given as, J=J01-r2R2 The surface area of the cylinder is,…

Q: What is the current in a wire of radius R = 2.83 mm if the magnitude of the current density is given…

A:

Q: What is the current in a wire of radius R = 2.01 mm if the magnitude of the current density is given…

A:

Q: A 2.0 x 102 - km - long high - voltage transmission line 2.0 cmin diameter carries a steady current…

A:

Q: The current density in a cylindrical wire of radius 3R is given by J = J.(1 --). Density is parallel…

A:

Q: The vector current density of a 3m long and 3mm diameter conductor is given as 155630 A/m^2.…

A: Write the formula for the current density.

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.