A permanent-magnet moving-coil instrument has a moving coil of 4 cm height 8 cm width, 3000 turns and internal resistance of 100 Q. The magnetic flux density is 0.25 Wb/m2. The deflecting torque required to give a full- scale deflection current of 100 mA is ..........

Q: Calculate the energy stored in the air gap and the total force acting on the armature

A: The above figure shows the single excited electromagnetic system. In this system has one coil is…

Q: Explain the hysteresis that can be found in materials due to force, magnetic and electrical…

A: The behavior of a ferromagnetic materials like iron, cobalt, and nickel can easily explained in…

Q: A magnetic coil with 2000 turns produces 1 mWb of flux when it carries a current of 2 A. The current…

A: Given,N=2000 turnsϕ=1mWb=0.001 WbI=2 AFlux collapses in t=10 ms= 0.01 sAverage voltage that will…

Q: A magnetic circuit has a mean flux path length of 800 mm and a reluctance of 2.5.105 A-t/Wb. A…

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Q: A resistance of the coil is 500 and the number of turns 200 turns, connecting in a row with a…

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Q: A 500-turn coil is wound on an iron core. When a 120-V-rms 60-Hz voltage is applied to the coil, the…

A: The solution is given below

Q: A flux of 0.0016 Wb flows in a silicon sheet steel coil/core. The arrangement appears as shown below…

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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.