Select the correct expression for e.m.f. of a metallic disk or radiu placed with its plane perpendic to the magnetic field B, and rot

Q: A magnetic core with an air gap is shown below. For a relative permeability is 3500, and the space…

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Q: Question An air core toroid with 500 turns having a cross section area of 6 cm² and a mean radius of…

A: An air core toroid- Number of turns N=500, Cross-section area A=6 cm2, Mean radius r=15 cm=0.15 m,…

Q: 1-22. For the figure below, determine the magnetic field intensity in A/m and its direction (into or…

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Q: What is the value of the magnetic field intensity at a distance of 0.1 m of a wire that is having a…

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Q: 5. Give the direction of velocity for an electric charge moving through a magnetic field that…

A: The relation between the force, velocity and magnetic field is F→=qv→×B→ The direction can be…

Q: Two VERY LONG wires are placed along parallel lines as shown below in the picture. The wire ON THE…

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Q: Determine the length of the air gap that will make its reluctance equal to that of the magnetic…

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Q: A wire is bent in the following shape and carries a current of 10 A in the direction shown. Find the…

A: Fx=Moi8R=4π×10-7×108×1Fx=5π×10-7TFy=Moi8R=4π×10-7×108×0.5Fy=10π×10-7TFZ=Moi8R=4π×10-7×108×0.5FZ=5π×1…

Q: 4. Induced current occurs when the magnetic flux through a conducting loop changes. This can happen…

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Q: b) Figure 6 shows a moveable wire PQ across a magnetic field B with force F at a constant velocity…

A: Given : v=4.0 cm/s=0.04 m/sI=10 cm=0.1 mB=0.5 TR=0.8 Ω The magnitude of induced emf is given by:…

Q: Suppose that a uniform magnetic field points into of this page. If a negatively charged particle…

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Q: A conducting loop is at rest with half of its area inside a magnetic field. Suddenly the magnetic…

A: In this question we need to choose a correct option.

Solenoids

A solenoid is a common term for a telephone coil used as an electromagnet. It also refers to any device that uses a solenoid to convert electrical energy into mechanical energy. The device generates a magnetic field from an electric field and uses the magnetic field to produce precise motion. Solenoid valves are often used to change power, such as in-car transmitters or valves, such as in the fuel system.