In this article we will discuss about:- 1. Introduction to Process of Magnetism 2. Production of EMF 3. Faraday's Laws of Electro-Magnetic Induction 4. Lenz's Law 5. Induced EMF 6. AC Excitation 7. Magnetic Hysteresis 8. Energy Expended 9. Energy Stored. Contents: Introduction to the Process of Magnetism Production of EMF Faraday's Laws of Electro-Magnetic Induction Lenz's Law Induced EMF [...]
The below mentioned article provides an experiment to determine the area of magnetic field of a bar magnet in a horizontal plane. The space surrounding a magnet where the force of attraction or repulsion due to that magnet is felt, is called magnetic field of that magnet. From theoretical consideration the magnetic field of a magnet is extended upto infinity. [...]
In this article we will discuss about the magnetic effect of electric current, explained with the help of a suitable diagram. When electric current flows through a conductor, a circular magnetic field is set up around the conductor along its length. This is called magnetic effect of electric current. The magnitude of the field depends on the current. If the [...]
In order to picture the magnetic field and its strength at different distances from the poles, it is convenie12341 to show the field as lines of force, generally known as magnetic lines of force. These lines have no physical existence and are only a means of representing magnetic field. Fig. 50(a) shows the magnetic lines of force of a bar [...]
The process by which a magnetic substance is magnetised is known as magnetisation. This process can be carried out by:- 1. Mechanical Method 2. Electrical Method. Essay # 1. Mechanical Method of Magnetisation: By this method bar magnets are made from bars of magnetic substances by rubbing them mechanically with one or two permanent magnets. There are three different methods [...]
When a coil of insulated wire is placed around a magnetic substance and electric current is passed through the coil, the substance becomes an electro-magnet and produces flux. The magnetic substance is called 'magnetic core', the coil around it is called 'magnetising coil' and the current flowing through the coil is called 'exciting current'. The polarity developed at any end [...]