An emf is an electrical potential difference between two points. It is measured in volts (V). It is generated by a source such as a battery, generator, or transformer. An emf has the ability to drive current through a circuit. An emf can be either positive or negative depending on the direction of the current. …
Peculiarities of the emf – ഇ എം എഫിന്റെ പ്രത്യേകതകൾ Read More »
Generators are devices used to convert mechanical energy into electrical energy. They usually have an electric motor which turns a coil of wire in a magnetic field to generate an electric current. Generators are used in many applications such as providing backup power for homes and businesses, powering large machinery, and providing power to remote …
Alternating current (AC) is an electric current that reverses its direction of flow periodically. It is the form of electricity used in most homes and businesses. Direct current (DC) is an electric current that flows in one direction only. It is the form of electricity used primarily in batteries and in electronics like computers and …
Fleming’s Right Hand Rule states that if you point the thumb of your right hand in the direction of the conventional current, and the fingers of the right hand in the direction of the magnetic field, the palm of the hand will point in the direction of the force experienced by the conductor.
1. Magnetic field strength 2. Number of turns in the coil 3. Area of the coil 4. Motion of the coil relative to the magnetic field 5. Frequency of the changing magnetic field
A galvanometer is an electrical measuring instrument used for detecting and measuring small electric currents. It consists of a coil of wire suspended between the poles of a magnet. When an electric current passes through the coil, it produces a torque which causes the coil to rotate. The angle of rotation is proportional to the …
Electromagnetic induction is a process whereby an electric current is generated within a conductor by changing the magnetic field around it. When a magnetic field is moved past a conductor, the magnetic field induces an electric current in the conductor. This is due to the fact that a changing magnetic field produces an electric field, …
Electro magnetic induction – വൈദ്യുതകാന്തിക പ്രേരണം Read More »
Michael Faraday (1791-1867) was an English scientist who made significant contributions to the fields of electromagnetism and electrochemistry. He is best known for his work on the electromagnetic field, which laid the foundation for the development of the modern electrical power industry. He also discovered the properties of electromagnetic induction, diamagnetism, and electrolysis. He was …
A moving coil loudspeaker is a type of loudspeaker that uses a permanent magnet attached to a diaphragm to create sound. The diaphragm is attached to a coil of wire, which is suspended in a magnetic field. When an electrical signal passes through the wire, it creates an interaction between the magnetic field and the …
Moving coil loud speaker – ചലിക്കും ചുരുൾ ലൗഡ്സ്പീക്കർ Read More »
A split ring commutator is a type of electrical switch that works by rotating two contact rings on an axis, allowing them to come into contact with each other and thus allowing electricity to flow. It is used to reverse the direction of current in an electric motor