Magnetic field values are often determined by using a device known as a search coil. This technique depends on the measurement of the total charge passing through a coil in a time interval during which the magnetic flux linking the windings changes either because of the motion of the coil or because of a change in the value of B. As a specific example, calculate B when a 89-turn coil of resistance 183Ω and cross-sectional area 39.1m2 produces the following results: A total charge of 5.16E-4C passes through the coil when it is rotated in a uniform field from a position where the plane of the coil is perpendicular to the field to a position where the coil's plane is parallel to the field.

Q: To measure the magnetic field, one of the method is through a coil of N turns of area A and placed…

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Q: nigure, a metal rod is force move with constant velocity along two parallel metal ralls, connected…

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Q: Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the…

A: The device generates the magnetic field from zero to 1.0 T in 100 ms.   The area of the circle of…

Q: A sketch below shows a mass spectrometer, that consists of a velocity selector and a deflection…

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Q: A vertical conducting rod is moving from the right of the page to the left of the page. A magnetic…

A: According to the right-hand rule, if the thumb is placed along the direction of the velocity and the…

Q: Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the…

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Q: R = 8.50 Ω, ℓ = 1.40 m, and B = 2.75 T. At what constant speed (in m/s) should the bar be moved to…

A: Given, Resistance, R = 8.50 Ω Length, l = 1.40 m Magnetic field, B = 2.75 T Current, i = 1.60 A i)…

Q: The current to an inductor with 25 windings and a cross sectional area of .025m^ 2 is increased such…

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Q: A conducting rod of length e moves on two horizontal, frictionless rails, as in the figure. A…

A: In the system drawn in the question, if we apply some force on the rod then there will be a current…

Q: The figure below shows a circular loop in an initial magnetic field 68.00 T. The loop has a radius…

A: Magnetic field strength(B1)=68.00 TRadius of loop (r)=0.29 mFinal magnetic field (B2)=74.00TArea of…

Q: Imagine a conductor on rails that completes the circuit below. There is also a magnetic field with…

A: Induced emf=lVB So i=E/R And recall P=iV

Q: The data on the coils indicate that they each have 210 N of resistance, a radius of 1.20 cm, and 50…

A: Given:- The resistance R = 210 ohm  The radius R = 1.20 cm = 1.20 x 10-2 m  The turn N = 50 x  2 =…

Q: ou are performing studies of the possibility of migrating birds using the Earth's magnetic field for…

A: Resistance is  Radius  is  Number of turns is The centers of the coils are separated by distance…

Q: A rectangular conducting loop has sides a = 0.065 m, sides b = 0.15 m, and resistance R = 55 Ω. It…

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Q: (a) How much current flows through the motor when it is running smoothly? (b) Suddenly the string…

A: This problem is using two basic formulas of Electrodynamics  1.I=VR , where V = Voltage I=Current…

Q: (a) Define self and mutual induction. Give practical examples of both inductions. (b) A circular…

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Q: You are performing studies of the possibility of migrating birds using the Earth's magnetic field…

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Q: When operated on a household 110.0 V line, typical hair dryers draw about 1450 W of power. The…

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Q: A conducting loop has an area of 280 cm² and resistance 15 . It is perpendicular to a spatially…

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Q: At a certain place, Earth's magnetic field has magnitude B =0.806 gauss and is inclined downward at…

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Q: Two identical conducting bars of length 56.6 cm can be moved across two parallel conducting wires.…

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Q: in the loop? Provide both the magnitude and direction of the current (as viewed from above the…

A: The loop’s configuration at the hometown and at the north pole can be represented as, The magnetic…

Q: Two power lines run parallel for a distance of 283 m and are separated by a distance of 40.0 cm. If…

A: Given Lenth of wire is 283m Distance between wires is 40cm or 0.4m Current in each wire is 115A…

Q: Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the…

A: the expression for the induced emf is,

Q: A conducting rod moves with a constant velocity in a direction perpendicular to a long, straight…

A: we know that magnitude of the emf generated between the ends of the rod moving in  a magnetic field…

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.