Whenever an electric current passes through it, a magnetic field is created. As previously stated, the power of the magnetic field depends on the electric current. Therefore, by varying the current as per our need, we can easily magnetize and demagnetize the electromagnet, enabling us to control...
The presented configurations include an electromagnet with a fast switching rate (fast field-cycling relaxometer), a permanent magnet with a strong magnetic field gradient, and a permanent magnet where the sample is placed in a homogeneous field. Measurements of a series of liquid samples that can...
Additionally, the circular shape of the toroid allows the magnetic flux to easily form a loop without requiring an extra return path.Chapter 4: What are the advantages and disadvantages of toroidal transformers?The previous chapter explored the fundamental differences between solenoid and toroid cores....
The input signal to a mechanical relay is usually a low-voltage DC signal that energizes the electromagnet and closes the mechanical contacts, allowing current to flow through the relay. The output voltage of a mechanical relay is usually AC or DC, which is switched on or off through mechanic...
Discuss the advantages and the disadvantages of AC and DC current. List three advantages of using a dielectric in a capacitor. What are the advantages and disadvantages of connecting batteries in series? In parallel? What are the advantages of using soft iron as a core, instead of steel, in...
Moving Coil Galvanometer: The term "galvanometer" refers to an electrical device that measures the magnitude of electric current. It consists of a coil wrapped over a ferromagnetic metal. This coil is free to rotate about its axis. Answer and Explanation:...
In 1820 Hans Christian Ørsted of Denmark discovered that a magnetic needle could be deflected by a wire carrying an electric current. In 1825 in Britain William Sturgeon discovered the multiturn electromagnet, and in 1831 Michael Faraday of Britain and Joseph Henry of the United States refined ...