Electromagnet is made of a wire twisted in a coil, creating amagnetic fieldbecause of the current flowing through the wire and coil's core. The magnetic field disappears as soon as the current is turned off. Anelectromagnetcan be represented as a magnet which is known to function on electric...
The working principle of the microwave oven mainly depends on ___. A. electromagnetic wave heating B. thermal conduction C. chemical reaction D. mechanical movement 相关知识点: 试题来源: 解析 A。解析:微波炉的工作原理主要是电磁波加热。选项 B 热传导不是主要原理;选项 C 化学反应错误;选项 D 机...
The ripple of the axial field is well within 卤 1 2 of 1% required by the experiments. The field along an axis 8 cm off center varies less than 卤2% from the central axis field. The air core electromagnet is in perfect working condition, and its physical characteristics such as field ...
What is the principle of an electromagnet? What is a lever? State its principle. On what principle refrigerator works? What's the physical meaning of the principle of work and energy? What is the principle of potentiometer? What is the principle behind the formula F=-dU/dx and its applicat...
The very basicconstruction of a DC motorcontains a current carrying armature, connected to the supply end through commutator segments and brushes. The armature is placed in between north pole and south pole of a permanent or an electromagnet as shown in the diagram above. ...
Another method is to make use of an electromagnet with a special core usually made of the metal nickel. When a high-frequency alternating current is passed through the electromagnet, the nickel core expands and contracts slightly in step with the current. The expansion and contractions set up ...
Cyclotron Definition: A cyclotron is defined as a device that accelerates charged particles using a magnetic field and an alternating electric field. Basic Construction: The cyclotron consists of an electromagnet, two Dees, and a high-frequency alternating voltage source. ...
How other speakers work?: "A" magnetic loudspeaker: also known as the "Reed loudspeaker", its structure as shown in Figure 4, an electromagnet is a movable plunger between the two poles of the permanent magnet, when no current coil of the electromagnet when the movable core is attracted by...
in various sectors. They convert electrical energy into mechanical motion. This enables precise control in applications. From fuel injectors to medical devices, solenoids optimize performance. Before diving deep into a solenoid’s principles, let’s get a basic understanding of what an electromagnet ...
What is an electric motor? What is the working principle of an electric motor? Learn the various types of electric motor here. Also, learn the different parts of a motor and their functions.