1. Particles with a charge of +3e are incident on a target. If the beam of particles carries a current of 111 µA, how many particles strike the target in a period of 30.0 s? 2. What is the fractional change in the resistance of an iron filament when its temperature changes from 21.4°C to 50.4°C (the 2 questions are not related)

Q: The current passing through a conductor is described by I(t) = lå e−¹/¹. If I = 2A and t = 0.5 s,…

A: The current passing through a conductor is described by

Q: The current-density magnitude in a certain circular wire is J= (3.00 x 1010 A/m*)r?, where ris the…

A: Given: Current Density,J3×1010A/m4r2Radius,r=2mm=2×10-3mPotential…

Q: a. If a current of 82.0 mA exists in a metal wire, how many electrons flow past a given cross…

A: (a) The current I is the amount of charge Q that crosses a certain point of the wire in a time :In…

Q: A service station charges a battery using a current of 5.7 A for 7.0 h. What is the total charge in…

A:

Q: 20. A conductor of cross-sectional area A, length l, and resistivity ρ has resistance R. What is the…

A:

Q: An insulated extension cord is made of a 1.5-meter long copper rod with a diameter of 2.3…

A: Given: The length of the wire is 1.5 m. The diameter is 2.3 mm.

Q: a. What diameter of copper wire [p = 2.65 x 10^-8 ohm.m) should be used so that a 22.0 m length will…

A: Part (a) Given: The resistivity of copper wire is ρ=2.65×10-8 Ω·m. The length of wire is L=22.0 m.…

Q: 15.

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Q: 1. The quantity of charge through a conductor is modeled as Q(1)= (4.2)f+(-0.8)t+ (5.1) C What is…

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Q: 1. Wires A and B are made of the same material and have the same length. Howeve the diameter of wire…

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Q: 1. The current supplied to an air conditioner unit is 4.5 amps. The air conditioner is wired using a…

A:

Q: An electric flat iron draws a current of 15 A when connected to a 110 V line. a. What is the…

A: Given data:  Current (I) = 15 A Voltage (V) = 110 V Length (L) = 2.5 cm = 0.025 m Cross sectional…

Q: A current of 5A passes through a wire. The number of electrons crossing a point in the wire in 2…

A: Given : I = 5 A t = 2 minutes = 2 × 60 = 120 seconds

Q: 4. The electrical resistance of human body in about 50 ko on average. If a person inadvertently…

A: Internal resistance (r)=2000 ohmsElectrical resistance of human body=50000 ohmsPower supply=20000 V

Q: A 100-m-long copper wire of radius 0.24 mmmm and mass 160 g is connected across a 1.5-V battery. The…

A: Given: length, l=100 m radius, r=0.24 mm=0.24×10-3m voltage, V=1.5 V resistivity, ρ=1.7×10-8Ω⋅m

Q: What is the resistance (in units of N) of a wire made of a material with a resistivity of 3.2 × 10-8…

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Q: 25. When a 2.0 V battery is connected to the ends of a 2 m wire, a current of 3 A flows in the wire.…

A: Current flowing through a conductor can be determined using Ohm's law. The law states that the…

Q: Particles with a charge of +4e are incident on a target. If the beam of particles carries a current…

A: Given data: Beam of particles caries a current, I=114 μA The time period for which particles strike…

Q: 280 CHAPTER 6. ELECTRONICS .6.17 How many electrons will pass through a cylindrical copper wire of…

A: We know current density J =I/A Where I = current flowing coper wire  A = area of copper wire But…

Q: Conducting Pipe: A pair of students working in a lab decide to use the plumbing to send electrical…

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Q: Electron guns are used in X-ray tubes. The electrons are accelerated through a relatively large…

A:

Q: A potential difference of 2.0 V is applied across a cylindrical conductor. The conductor is 20.0 m…

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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: In a wire with a 2.63 mm² cross-sectional area, 5.51 × 1020 electrons flow past any point during…

A: Given data:  Cross sectional area (A) = 2.63 mm2 = 2.63×10-6 m2 Number of electrons (n) = 5.51×1020…

Q: 5. An iron wire has a cross-sectional area of 5.00 x 10-6m². Carry out the following steps to…

A: Given data The cross-sectional area of the wire is: A = 5 x 10-6 m2 The current in the wire is: I =…

Q: Fill in the blank with the correct answer. Sami suggested replacing the copper wire used in the…

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Q: 2. The current density in a copper wire of diameter 1.5 mm ig 1.5x 10° A/m2. The number of free…

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Q: .A burning lamp is marked 800 kW, 230 kV. (a) How much current flows through the lamp? (b) What is…

A: Note: Asper Bartleby guidelines only one question has to be solved at a time. Upload other parts…

Q: Current and Resistance Problem 9:   An extension cord that has a length of 9.65m is made from wire…

A: Please see the attached image for the solution.  If there are queries or if the image is not…

Q: 1. An unknown alloy is subjected to an electric field of 25 V/m, and has a current density of 1.45 ×…

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: Particles with a charge of +2e are incident on a target. If the beam of particles carries a current…

A: The total charge of the particles is

Q: 1. Wires A and B are made for the same material and have the same length. However, the diameter of…

A: Note : We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: Two wires, A and B, are made of the same material. The length of A is four times the length of B.…

A: Let the length and crossectional area of wire B is lB and AB respectively then, Length of Wire A: lA…

Q: - C are 2.0 x 10-6 n·m and 1.00 wires are joined as shown in the F

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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: The resistivity of gold is 2.44 × 10-º Q • m at room temperature. A gold wire that is 0.9 mm in…

A: Given information: The resistivity of the gold (ρ) = 2.44×10-8 ohm .m  The diameter of the gold wire…

Q: 1. Electron guns are used in X-ray tubes. The electrons are accelerated through a relatively large…

A:

Q: . A certain lightbulb has a tungsten filament with a resistance of 19.0 N when at 20.0°C and 140 N…

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.