Three cylindrical wires are made of the same material. Their lengths and radii are wire 1: length ℓ, radius 2r wire 2: length 2ℓ, radius r wire 3: length 3ℓ/2, radius r/2  A potential difference V is applied across the length of the wires. Rank them according to the current that flows through them, greatest first.

Q: An accelerator produces a beam of protons with a circular cross section that is 2.3 mm in diameter…

A: Diameter of beam = 2.3 mm Current (I) = 0.8 mA Kinetic energy of proton = 20 MeV = 3.2044 × 10-12 J…

Q: The figure below shows a cross sectional view of 5 wires separated by a distance d = 0.0342 m. The…

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Q: Assume that R1 = 1.00 kohm, R2 = 2.00 kohm, R3 = 3.00 kohm, E1 = 60.0 V, E2 = 55.0 V and E3= 65.0 V.…

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Q: e figure below shows a cross sectional view of 5 wires separated by a distance d = 0.0416 m.  The…

A: Let the currents into the page be written as negative and currents out of the page be positiveThe…

Q: The charge passing through a section of wire is given by Q=7 t6 - 5 t4 + 4 t3 + 2 t - 32. What is…

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Q: A silver wire and a gold wire of the same length have the same potential difference applied to them.…

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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: What is the magnitude of the current through R3? What is the magnitude of the current through R2?…

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Q: "You are asked to make a 13 2 resistor with a spool of wire of radius 7.5 × 10-5 m and resistivity…

A: given  R = 13 ohm  Resistivity = 1.68 × 10-8 ohm  r = 7.5×10-5 m  Using formula

Q: A 14 gauge copper wire of diameter 1.628 mm carries a current of 10.5 mA. (ρcopper=1.72×10−8Ω⋅m.)…

A: Write the given values with the suitable variables. d=1.628 mm=1.628×10-3 mI=10.5 mA=10.5×10-3…

Q: A cylindrical wire has a radius r and length I. If both r and I are doubled, what happens to the…

A: Given that:A cylindrical wire has a radius r and length l.Both r and l are doubled.

Q: Two conducting wires A and B of the same length and radius are connected across the same potential…

A: The dimensions of both wires are same. Now since the resistivity of A is nine times the resistivity…

Q: The current in a wire varies with time (measured in seconds) as I = 31 A − (0.18 A/s2)t2. Determine…

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Q: Consider the circuit shown in the figure, where ɛ, = 22.7 V, E, = 12.3 V, and R = 14.0 Q. (Due to…

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Q: A large spool in an electrician’s workshop has 75 m of insulation coated wire coiled around it. When…

A: Given Data: The initial length of coated wire L1=75 m Initial Current through the wire I1=2.4 A…

Q: The quantity of charge through a conductor is modeled as Q = (3.00 mc/s4)t4 - (4.00 mc/s)t + 7.00…

A: Given value--- Q = (3 mC/s4) t4 - (4 mC/s) t - 7 mC . We have to find--- what is the current at t…

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: In the figure,E₁ = 6.00 V, E₂ = 12.0 V, R₁ = 100 S2, R₂ = 200 N, and R3 = 300 2. What are the (a)…

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Q: The current in a wire varies with time according to the relation I = 55 A - (0.65 A/s²)t². For…

A: Given Data :Current as a function of time I(t) = 55 A - (0.65 A/s2)t2Current is given asI =…

Q: Wires 1 and 2 are made of the same metal. Wire 2 has same length but twice the diameter of wire 1.…

A: Wire 1 and wire 2 are made of same metal, so resistivity (ρ)of both wires is same. Both wire have…

Q: Wires A and B are identical (same length and radius) except that each is made from a different…

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Q: A charge crossing a sui in Coulombs and the ti t = 3.0 s. O (a) 459 A O (b) 153 A

A: GivenQ=5 t3+3t2+8

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.