Let's take a current-carrying cable with a gradually narrowing cross-sectional area along the length of the wire so the wire turns into the shape of a very long, truncated cone. How does the drift speed (vd) vary along the length of the wire?  It speeds up with the length or   vd first increases and then goes down after it reaches to a critical value.or    It slows down with the length of the cable or    vd remains the same regardless the cross section of the cable

Q: R1 R2 S

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Q: For the circuit shown below, E = 26 V, L = 4.8 mH, and R = 4.5 Q. After steady state is reached with…

A: Given  ∈=26 VL = 4.8 mHR = 4.5 Ω

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Q: Question #12. Calculate the current in Resistor 3 (R3). (3 pts) V1 10V R3 R1 R2 12 12 R4 122

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Q: Wire A and Wire B are each carrying the same current. If the diameter of Wire A is twice that of…

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Q: For the circuit shown below, € = 17V, L = 8mH, and R = 50. After steady state is reached with S₁…

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Q: In the circuit of the figure & - 1.33 kV, C - 7.30 µF, R1 = R2 - R3 = 0.830 MQ. With C completely…

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Q: In the circuit of the figure & = 1.70 kV, C = 9.50 µF. R = R2 = R3 = 0.750 MQ. With C completely…

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Q: The figure below is a cross-sectional view of a coaxial cable. The center conductor is surrounded by…

A: (a) B = u0*I1/(2pi*a) = (4pi*10^-7*1.14)/(2pi*1*10^-3) = 228*10^-6 T = 228 uT upward

Q: Taking R = 2.30 kN and Ɛ= 490 V in the figure shown below, determine the magnitude and direction of…

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Q: epresented by the variable j

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Q: In the figure below, a rectangular circular wire has a length a = 2.2 cm and a width b = 0.8 cm, and…

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Q: In the circuit shown, E = 4V, R₁ =43, R₂ = 72 , and C = 14 µF. I₁* Initially, the capacitor is…

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Q: (mC) 60 15 0 1 2 4 5 mA O 10 mA 15 mA 20 mA O 25 mA 3.

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Q: Calculate the current through the resister.  Which way does it go?  (Upward or downward) Please see…

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Q: 7. A current sheet, K = 6.0ax A/m, lies in the z = 0 plane and a current filament is located at y =…

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Q: The figure below shows a cross sectional view of 5 wires separated by a distance 0.0147 m. The…

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Q: A current is a wire varies with time according to the relationship I = 45A – (0.754)t,how many…

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Q: A student wants to know how much current passes through three (3) wires that are made of different…

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Q: A metal rod of length L has a resistance of 15 Ω when the current flows in the direction of L. 4 The…

A: Given: The resistance of the metal rod is 15 Ω. The length of the rod is L. The new length of the…

Q: The figure below is a cross-sectional view of a coaxial cable. The center conductor is surrounded by…

A: here we use the Ampere circuital law         I1 =1.20 Amp out of the page    r1 = d = 10-3 m  I 2…

Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.