A large spool in an electrician’s workshop has 75 m of insulation coated wire coiled around it. When the electrician connects a battery to the ends of the spooled wire, the resulting current is 2.4 A. Some weeks later, after cutting off various lengths of wire for use in repairs, the electrician finds that the spooled wire carries a 3.1-A current when the same battery is connected to it. What is the length of wire remaining on the spool?

Q: The thin copper wire with radius of 1.3 mm is wound into a torus shaped coil as revealed in figure.…

A: The given values are,

Q: 1. A large spool in an electrician's workshop has 75 m of insulation coated wire coiled around it.…

A: Given That-The initial length of coated wire Initial Current through the wire  Final Current through…

Q: Two uniform wires of same mater one having double the length of t series, carrying a current of 10…

A:

Q: A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.00 m…

A: Given The radius of the wire is r=0.4 cm=0.4×10-2 m. The potential difference across 3 m long wire…

Q: A 22 gauge aluminum wire is connected in series to a 30 gauge copper wire. Each of the wires is 0.75…

A: Answer the following question is

Q: Some airliners use wires of aluminum (resistivity2.75 * 10^-8 Ω . m) rather than copper to reduce…

A: We know that Ohm's Law is given as: R =VI ---(1) in the given question, length of aluminium wire,L =…

Q: Taking R = 1.60 kN and E = 210 V in the figure below, R 2R be 28 4R 3R determine the direction and…

A:

Q: Two wires made of different materials have the same uniform current density. Which of the following…

A: Current density is current per unit area.

Q: A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.40 m…

A: (a)  From Ohm’s law, Here, V, I and R represent the potential difference, the current flow in the…

Q: A current of 2 A flows through a gold wire with a radius of 3 cm and a length of 15 m. There are…

A: Current (I) = 2 A radius (r) = 3 cm Length (L) = 15 m number of free electrons per unit volume =…

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

A:

Q: A 200km long high voltage transmission line runs across the Arizona open desert. The copper wire…

A: Given,Length of the high tension wire, L =200 kmdiameter of the copper wire, d = 2.00 cmcurrent, I =…

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

A: Data provided:  Voltage (V) = 25 V Time (t) = 3 ms = 3×10-3 s Energy (E) = 0.90 J Asked: Current (I)…

Q: The following results are for five cells in series. The e.m.f. of the five cells together is 6.9 V.…

A: E = 6.9 V  V = 3.3 V  R = 2.2 ohm I =1.5 A

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

A: Current (I) = 12 A Voltage (V) = 25 V time (t) = 3 millisecond

Q: A wire carries a current, i=3cos314t . What is the average current over 6 seconds? a.0.0016 A b.…

A: Given : t=6s The current in wire is given as :  i=3cos314t The average current over t seconds is…

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: Resistance 2.A copper wire has a square cross section 2.3 mm on a side. The wire is 4.0 m long and…

A: Given Length of each side of cross-section is a=2.3 mm=2.3×10-3 m Length of the wire is l=4.0 m…

Q: A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.60 m…

A:

Q: A 14.0 gauge copper wire of diameter 1.628 mm carries a current of 12.5 mA . What is the…

A: Length of copper wire (L) = 2 m resistivity of copper wire (ρ) = 1.72×10-8 ohm-meter diameter of…

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: When a current passes through the body, it is mainly carried by positively charged sodium ions (Na+)…

A: Given information: The current is carried by the Sodium ions (Na+) with charge +e and Chloride ions…

Q: Taking R = 1.00 kN and E = 250. V in Figure Pl8.21, determine the direction and magnitude of the…

A:

Q: Current describes the rate of electricity (how fast charges are moving). Its formula is I = . The…

A:

Q: 24. A conductor carries a current that is decreasing exponentially with time. The current is modeled…

A: 24  Given,     I=I0 e-t/τ     I0=3.0 A     τ=0.50s  Let 𝓠 be the amount of charge that flows…

Q: Two cylindrical wires are cojoined sequentially with one wire twice as thick as the other. If this…

A: Thickness of first wire= 1 mm  Thickness of second wire = 2 mm Current flowing through 1 mm thick…

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

A: When a source delivers current i A at potential, it delivers a power P=iV Watt. So, the energy…

Q: In a large flashlight, the distance from the on-off switch and the light bulb is 10.8 cm. (a)…

A:

Q: A long wire with a radius of 0.450 cm carries a current. The potential difference across a 3.10 m…

A: The radius of the long wire is r= 0.450 cm= 0.45x10-2 m. The length of the wire section is L = 3.10…

Q: er 0.84 mm, the electric field in the wire is 0.49 V/m the current carried by the wire? the…

A: Electric current is defined as the rate of flow of electrons in a conductor. Here, we calculate the…

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

A: Given,t = 3 millisecondsVoltage = 25 VEnergy transferred = 0.9 J

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

A: Given data:  Potential difference (V) = 25 V Time (t) = 3 ms = 0.003 s Energy (E) = 0.90 J Required:…

Q: If the current in "i," is 12 A, and the current in the section of wire labeled "iz" is 2.66 A, what…

A:

Q: Variations in the resistivity of blood can give valuable clues about changes in various properties…

A:

Q: A 3.00 m length of copper wire at 20oC has a 1.20-m-long section with diameter 1.60 mm and a…

A: Given data first length L1=1.20 m having diameter d1= 1.60 mm so r1=0.8 mm and current I1=2.5 mA…

Q: Along the x axis, 3.57E16 electrons move from x = –1.00 m to x = 1.00 m in 9.25 s. What is the…

A: To find the average current through the origin, we need to calculate the total charge passing…

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: One room of a house has two mats for radiant heating. The mats are wired inparallel. One mat draws 5…

A: One mat draws current 5 amperes The other mat draws current 3 amperes

Q: A beam of protons is moving toward a target in a particle accelerator. This beam constitutes a…

A: (a) Given: The current is 0.50 μA. The time duration is 15 s.

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.