The figure shows a bar of mass 0.2kg that can slide without friction on a pair of rails separated by a distance  l=1.20m and located on an inclined plane that makes an angle of 25° with respect to the ground. The resistance of the resistor is 1 ohm and a uniform magnetic field of magnitude H=0.5T is directed downward, perpendicular to the ground,over the entire region through which the bar moves. Find the speed at which the bar slides alon

Q: An electron is shot into one end of a solenoid. As it enters the uniform magnetic field within the…

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Q: A conducting bar of mass m = 1kg and length l = 1m is in contact with a thin conducting circular…

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Q: Assume that a car travels northward at 75km/h along a straight road in a region where Earth’s…

A: Given data :- velocity of car v = 75 km/h = 20.833 m/s vertical component of the Earth’s magnetic…

Q: Design a current loop that, when rotated in a uniform magnetic field of strength 0.10 T, will…

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Q: A square coil of wire of side 2.25 cm is placed in a uniform magnetic field of magnitude 2.00 T…

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Q: A square coil of wire of side 4.00 cm is placed in a uniform magnetic field of magnitude 2.00 T…

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Q: A car travels northward at 75km/h along a straight road in a region where Earth’s magnetic field has…

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Q: A bar of length L = 24cm is free to slide without friction on horizontal rails. There is a uniform…

A: Step1    . Length of bar  L=24cm=0.24m     .Uniform magnetic field,  B=2T     .Emf of battery,…

Q: A bar of mass 0.2 kg that can slide without friction on a pair of rails separated by a distance,l=…

A: Given that,  mass = 0.200 kg       l = 1.20 , θ = 25°  , R = 1Ω  and  B=0.500 TWe know that,…

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: A conducting bar of mass m 1kg and length I 1m is in contact with a thin conducting circular ring as…

A: Given that, m = 1 , L = 1 , B = 1 T, R = 1 ohm By torque balance on rod about center point, Fb*(L/2)…

Q: A conducting bar of mass m = 0.2 kg, length / = 0.5 m, and resistance R slides in a horizontal plane…

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Q: In a 260-turn automobile alternator, the magnetic flux in each turn is g = 2.50 x 10* cos wt, where…

A: Given value--- No of turn = 260 . magnetic flux = 2.5 × 10-4 cos (Omega t ) angular speed of engine…

Q: Below is a Motional EMF problem with a sliding, conducting bar connecting a wire loop within a…

A: Given:- The velocity of the bar V = 25.0 m/s  The magnetic field B = 0.640 T  The resistance in the…

Q: In the figure, a long rectangular conducting loop, of width L = 19 cm, resistance R = 13Q, and mass…

A: Given points Width of the loop L = 19 cm = 0.19 m Resistance of the loop R=13  Ω Mass of the loop m…

Q: The figure below shows a bar of mass m - 0.240 kg that can slide without friction on a pair of rails…

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Q: 5) A metal bar with length L= 0.50 m, mass m = 80 gram, and resistance R = 5 N is placed on fri…

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Q: Suppose that a solenoid has a length of 75 cm and has a cross sectional area of 0.800 cm². It also…

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Q: You are designing a generator to have a maximum emf of 8.0 V. If the generator coil has 200 turns…

A: Given : Maximum emf V = 8.0 V             Number of turns N = 200 turns             Cross sectional…

Q: Figure P20.29 shows a bar of mass m = 0.200 kg that can slidewithout friction on a pair of rails…

A: The below figure indicates the magnetic field of the bar,

Q: A square coil of wire of side 2.55 cm is placed in a uniform magnetic field of magnitude 1.75 T…

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Q: Consider the arrangement shown in the figure below where R = 8.50 Q, = 1.00 m, and B = 3.00 T. R.…

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Q: A circular loop of wire with radius R= 20cm is oriented in such a way that its plane makes an angle…

A: Given data, Current in the loop = 2 A Radius of the loop = 20 cm

Q: A square coil of wire of side 2.35 cm is placed in a uniform magnetic field of magnitude 2.00 T…

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Q: A conducting rod with length L = 21.5 cm is being pulled along a long rotated U-shape conductor,…

A: herethe magnetic induced emf:ε=-dBAcosθdt

Q: A solid conducting fly-wheel 0.6 m in diameter, is revolving on a horizontal axle which lies in the…

A: area swept by rod in one rotation = π0.32 Hence change in flux in one rotation = Bπ0.32 Hence emf…

Q: A square coil of wire of side 3.05 cm is placed in a uniform magnetic field of magnitude 1.75 T…

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Q: At a certain place, Earth’s magnetic field has magnitude B = 0.590 gauss and is inclined downward at…

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Q: Consider the apparatus shown: a conducting bar is moved along two rails connected to an incandescent…

A: a) The expression for the emf developed in the system is,

Q: You are designing a generator to have a maximum emf of 8.0 V. If the generator coil has 200 turns…

A: Given, Number of turns,N=200 Cross-sectional area,A=0.03 m2 Magnetic field,B=0.03 T Maximum…

Q: A square coil of wire of side 2.85 cm is placed in a uniform magnetic field of magnitude 2.25 T…

A: (a) Write the formula for the area of a rectangular coil.

Q: An electron is shot into one end of a solenoid. As it enters the uniform magnetic field within the…

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Q: A square coil of wire of side 3.90 cm is placed in a uniform magnetic field of magnitude 2.25 T…

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Q: A conducting rod of length ℓ = 35.0 cm is free to slide on two parallel conducting bars as shown in…

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Q: A 227-turn circular coil of radius 24 cm is perpendicular to a uniform magnetic field of 0.55 T.…

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Q: In Fig. 2, an electron with an initial kinetic energy of 5.0 keV enters region 1 at time t= 0. That…

A: Given data: Points to keep in mind, When the electron enters the regions (1) and (2), it will…

Q: . A uniform magnetic field of magnitude B = 0.170 T pointing out of the page exists in a region…

A: Faraday's law states that the induced emf in a conductor is directly proportional to the rate of…

Q: The loop in the figure has a resistance of 2.5 Q and is being pulled to the right at 1.0 m/s. X X X…

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Q: In the figure below, a metal bar sitting on 2 parallel conducting rails connected to each other by a…

A: Givens: Magnetic field, B=2.10 T Distance between the rails, l=1.2 m Resistance, R=9 Ω Current,…

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: Mass m = 1.30 kg is suspended vertically at rest by an insulating string connected to a circuit…

A: (a) The magnetic force experienced by the loop must be sufficient enough to balance the weight of…

Q: A metal bar with length L = 0.40 m ,mass m = 200 gram, and resistance R = 10 N is placed on…

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Q: A uniform magnetic field of magnitude B = 0.170 T pointing out of the page exists in a region where…

A: This question is based on Electromagnetic induction topic. Faraday's law of electromagnetic…

Q: How much energy is stored in a cylindrical solenoid of length 0.734 m and radius 0.0509 m which has…

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Q: A coil of ten turns of area 0.01 m2 and resistance 5 Q is placed perpendicularly inside a magnetic…

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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.