A solenoid (made as a long coil) is a type of electromagnet, the purpose of which is to generate a controlled magnetic eld through a coil wound into a tightly packed helix. Now calculate the self-inductance if the number of windings are 100 of a 5.0 cm long solenoid with cross-sectional area of 0.30 cm2.

Q: A wire of nonmagnetic material, with radius R, carries current uniformly distributed over its cross…

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Q: A long solenoid of radius r = 2.65 cm is wound with 4.00 x 103 turns/m and carries a current that…

A: r =2.65 cm N= 4* 103 turns/m

Q: A rectangular wire loop with length a and width b lies in the xy-plane, as shown below. Within the…

A: Given: A rectangular wire loop with length a and width b lies in the xy-plane, as shown below,

Q: A circular loop of wire with radius r= 10 cm and resistance R= 2.0 Ωlies in the xyplane. The loop is…

A: a. Using Faraday's law, emf induced is,…

Q: When a certain inductor carries a current I, it stores 3mJ of energy in its magnetic field. How much…

A: Suppose inductance of conductor is L. Current flowing throught inductor is I. Energy = LI²/2.

Q: At t = 0, a battery is connected to a series arrangement of a resistor and an inductor. At what…

A: The expression for the instantaneous current is,

Q: An air-core solenoid with 68 turns is 8.00 cm long and has a diameter 1.20 cm. When the solenoid…

A: Given: N = 68L = 8.00 cm = 0.08  md = 1.20 cm =0.012 mi = 0.770 A

Q: A square wire loop 46 cm on a side, with resistance 49 m2, has its plane normal to a uniform…

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Q: A 41.0 mA current is carried by a uniformly wound air-core solenoid with 445 turns, a 12.0 mm…

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Q: The magnetic flux through a coil is changing as shown in the figure below. At which times (indicated…

A: We know that, induced current is directly proportional to rate of change of magnetic flux.

Q: A circular wire loop of radius 12 cm and resistance 8.5 Q is located in a uniform magnetic field…

A: Radius, r = 12 cm = 0.12 m  BMax = 0.5 T Δt = 4 s - 2 s = 2 s

Q: In a 250-turn automobile alternator, the magnetic flux in each turn is P = 2.50 × 10-4 cos wt, where…

A: Introduction:The equation for induced emf is given as:ε = -NdϕBdt   -1Here, N are the number of…

Q: In a 240-turn automobile alternator, the magnetic flux in each turn is OR = 2.50 x 10** cos ot,…

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Q: A square wire loop 46 cm on a side, with resistance 49 m2, has its plane normal to a uniform…

A: Side of square wire loop L = 46 cm = 0.46 m Resistance of square wire loop R = 49 mΩ = 4.9×10-2 Ω…

Q: A 39.0 mA current is carried by a uniformly wound air-core solenoid with 455 turns, a 14.5 mm…

A: Given Data: The current in the air-core solenoid is, I=39.0 mA The number of turns in a solenoid is,…

Q: When the current through an inductor is decreasing at a constant rate of 0.5A/s, the magnitude of…

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Q: For a non-deformable loop of area A, immersed in a uniform magnetic field B. The induced fem is…

A: For a non -deformable loop of area A, immersed in a  uniform magnetic field B. where B  is the…

Q: A 40.0-mA current is carried by a uniformly wound air-core solenoid with 450 turns, a 15.0-mm…

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Q: The induced e.m.f. in a coil is 2.10 × 10-2 V when the current in it is changing at a rate of 7.00 x…

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Q: For a toroidal solenoid with the average circumference L =10 cm and 200 coils, the current is 100…

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Q: A long solenoid of radius r = 1.85 cm is wound with 4.50 ✕ 103 turns/m and carries a current that…

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Q: In a 290-turn automobile alternator, the magnetic flux in each turn is PR = 2.50 x 10-4 cos wt,…

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Q: Determine the induced emf in the alternator as a function of time. (Assume is in V.) = (b)…

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Q: A very large, superconducting solenoid such as one used in MRI scans, stores 1.00 MJ of energy in…

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Q: The radius of the circle forming a coil of N=105 turns is given as r=4.3cm. The coil is placed in…

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Q: An air-core solenoid with 66 turns is 8.00 cm long and has a diameter of 1.20 cm. When the solenoid…

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Q: In a 300-turn automobile alternator, the magnetic flux in each turn is og = 2.50 x 10* cos wt, where…

A: The given data are listed below with appropriate variables.  Here, N denotes the turn, ΦB denotes…

Q: A conducting rod with length L = 18.6 cm is being pulled along a long rotated U-shape conductor,…

A: Write the expression for the induced emf and substitute the required values.

Q: A 40 turn conductive loop encloses an area of 0.55 m?. At what constant rate should the magnetic…

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Q: A circular coil has a 10.0 cm radius and consists of 30 closely wound turns of wire. An externally…

A: An inductor is a device that formed a known magnetic field in a stated region. If a current I is…

Q: There is a uniform magnetic field of B frictionlessly on other wires in the horizontal direction, is…

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Q: An air-filled toroidal solenoid has a mean radius of 15.0 cm and a cross-sectional area of 5.00 cm2.…

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Q: A rectangular conducting loop is placed on a flat surface, with the longer sides parallel to a…

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Q: A long solenoid of radius r = 1.60 cm is wound with 4.00 ✕ 103 turns/m and carries a current that…

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Q: A 2-turn planer loop of flexible wire is placed inside a long solenoid of n turns per meter that…

A: The emf induced in the loop. given,no. of turns per unit length(n)=500 m-1maximum Current(Io)=20…

Q: An air core solenoid has a length of 10 cm and a cross-sectional area of 5 cm?. If it is wound with…

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Q: A 50cm long solenoid, having 500 turns and radius 2cm ,is wound on an iron core of relative…

A: Length of solenoid: l = 50 cm = 0.50 m Number of turns : N = 500  Radius of solenoid; r = 2 cm =…

Q: Find the magnitude and direction of the induced emf around the rectangular loop of sides a and b as…

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Q: A coil has an area of 100 cm² with 219 turns connected across a 5.00 2 resistor to form a closed…

A: Given: Area of coil A = 100 cm2. Turns N = 219  Resistance R=5.0 Ω Initial magnetic Field B = 1.6 T…

Q: In the toroidal core-coil assembly of Figure 2, the coil has N= 250 turns, the relative permeability…

A: (a) The magnetic flux density at the mean radius of the toroid can be determined as, Here, µo, I ,…

Q: A square wire loop 20 cm on a side, with resistance20 m , has its plane normal to a uniform magnetic…

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Q: A circular coil has 250 turns and radius 1.50 cm. When a current of 5.00 A flows in the coil, the…

A: Given, Number of turns n=250 Radius R=1.50 cm Current I=5.00 A Magnetic flux density B=0.050 T

Q: For a current-carrying loop attached to a fixed axis in a uniform magnetic field, what is the phase…

A: Required : What is the angular difference between when the flux is maximum and when the torque is…

Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.