Two solenoids are close together as shown. When the value of current is decreased in R1 at a constant rate, in what direction does the induced current flow through R2?

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

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Q: A metal wheel with an area of 30 m2 spins at 2 rpm about a vertical axis at a place where Earth’s…

A: The magnetic field passes is along the vertical axis, and its is perpendicular to the area vector.…

Q: moving at a velocity of 5.80 m/s toward a parallel (much longer) wire which carries a current of…

A: concept and formula here  we use the formula of induced emf and magnetic field due to long straight…

Q: A patient having an MRI scan has neglected to remove a copper bracelet. The bracelet is 6.0 cm in…

A: emf=dϕdt=AdBdt=πr21-.4t=π×36×10-41-.44×1.2=1.413×10-3volt

Q: A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field,…

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Q: A circular metal disk of radius R rotates with angular velocity ω about an axis through its center…

A: Given variable : radius of disc - R angular velocity - ω magnetic field -  B  To determine : emf…

Q: Solenoid is 25 cm long and has a diameter of 5 cm. It is made up of 300 turns of wire. A Current is…

A: Length, L = 25 cm = 0.25 m Diameter, d = 5 cm Radius, r = d/2 = 2.5 cm = 0.025 m Number of turns, n…

Q: A conducting rectangular loop ofmass M, resistance R , and dimensions w by l falls from rest into a…

A: (a)Magnetic force exerted on the lower end of the loop:

Q: A very long solenoid with tightly wound coils has8.00 * 10^3 turns of wire per meter of length. What…

A: Givens, n=Nl=8×103B→=0.032T

Q: The magnetic flux through a coil of wire Λ changes from 30T *m ^ 2 to zero in a time of 0.50 s. What…

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Q: The magnetic flux through a coil of wire changes from 9T m- to zero in a time of 0.50 s. What is the…

A: 18 V

Q: A 12 turn conductive loop with an enclosed area of 0.62m2 exists in the plane of the page. A…

A: The Faraday's law of induction states that an emf is induced in a coil when the magnetic flux…

Q: Problem 6: Two power lines, line 1 and line 2, both of length L 88 m, are strung east-west between…

A: Given:  LL= 88 m              IL = 77 A            r12 = 1.1 mFind: (a) Magnitude of magnetic field,…

Q: A conductive loop on the x-y plane is bounded by p = 2.0 cm, p = 6.0 cm, 0 = 0º and 90°. 1.5 A of…

A: To determine the magnetic field strength (H) at the origin due to the current flowing in the…

Q: A long, cylindrical solenoid with 100 turns per centimeter has a radius of 18.7 cm. If the current…

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Q: A segment of wire 5.7 cm long is moving at a velocity of 2.89 m/s toward a parallel (much longer)…

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Q: A uniform magnetic field is perpendicular to the plane of a circular wire loop of radius r. The…

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Q: A charge of 0.5 C moves at a speed of 400 m/s at an angle of 30° to a magnetic field of strength…

A: Given, Charge,q=0.5 C Velocity,v=400 m/s Angle, θ=30° Magnetic field,B=0.5 T

Q: Currents I and 2I (I = 46,9 A) flow through two infinitely long wires crossed at a right angle.…

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Q: A square loop whose sides are 6.0-cm long is made with copper wire of radius 1.0 mm. If amagnetic…

A: Given : L = 6 cm = 0.06 m r = 1 mm = 0.001 m dB/dt = 5 mT/s = 0.005 T/s

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

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Q: ACTIVITY #2 – PROBLEM-SOLVING A closely wound solenoid of 1,250 turns has an axial length of 98cm…

A: Given: The number of turns is 1250. The leght of the solenoid is 98 cm. The radius of the solenoid…

Q: cm. The magnetic field is unifor

A: Given Data The radius of circular ring is:r=3.1 cm=0.031 m The resistance of ring is:R=2Ω The…

Q: he magnetic flux though a coil of wire that has 70 turns is changing at a rate of 0.030 Tm^2/s. What…

A: According to lenz's law magnitude of induced emf = Ndϕmdt , where N is number of loop and dϕmdt is…

Q: Anupright rectangular loop of height a and width b has a lightbulb attached to it, with some…

A: We are given magnetic field. We are given dimensions of rectangular loop. The loop is rotated in…

Q: A solenoid of length 2.50 cm and radius 0.750 cm has 33 turns. If the wire of the solenoid has 1.25…

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Q: The circuit given is a square 20 cm on a side. The magnetic field increases steadily from 0 T to…

A: Magnitude of emf induced is given by, e=dϕdte=AdBdte=a2dBdte=0.220.500.010e=2V

Q: A closely wound solenoid of 2000 turns has an axial length of 64 cm and a radius of 2.50 cm. When…

A: The formula for magnetic flux density or magnetic field is given by  B = μ0nI = μ0NI /H where μ0 =…

Q: A solenoid has radius 5.80 mm, length 11.0 cm, 5000 turns, and is placed with its axis of symmetry…

A: Recall Faraday's law of electromagnetic induction, ε=N∆∅∆t

Q: A solenoid ring with N = 3 loops is immersed in a uniform time-varying magnetic field (shown in the…

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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.