Mindblown: a blog about philosophy.
-
DC Generator
What is a DC Generator? A DC generator is an electrical machine whose main function is to convert mechanical energy into electricity. When the conductor slashes magnetic flux, an emf will be generated based on the electromagnetic induction principle of Faraday’s Laws. This electromotive force can cause a flow of current when the conductor circuit…
-
Testing of DC Machine
Open Circuit Test The open-circuit test is expected to decide a DC machine’s open-circuit characteristic or magnetic characteristic. The open-circuit test gives the MMF and, subsequently, the excitation current or field current expected to produce the required voltage on no heap at a settled speed. The open-circuit characteristic curve demonstrates the variety of instigated emf as an element of…
-
DC Motor
What is a DC Motor? A DC motor is defined as a class of electrical motors that convert direct current electrical energy into mechanical energy. From the above definition, we can conclude that any electric motor that is operated using direct current or DC is called a DC motor. We will understand the DC motor…
-
Ohm`s Law
What Is Ohm’s Law Ohm’s law is the relationship between voltage, current and resistance and how they relate to each other. Ohm’s law was developed by a German physicist named Georg Ohm who undertook many experiments to develop his theory including measuring current by touching electrical circuits to see how much it hurt. The higher…
-
Cause of Resistance
An ideal conductor would be made from a material which posed no resistance to the flow of electrons. In the real world though, all materials will give some level of resistance, the level of resistance can also vary within the conducting material used. Some of the things which vary a conductors level of resistance are listed…
-
Measurement of resistance
Resistance is measured in the SI units of Ohm’s which is represented with the Greek letter omega Ω. Materials are tested for their level of resistance by measuring the amount of current that passes across the conductor. An instrument for measuring resistance is called an ohmmeter.
-
Electrical Resistance
What is resistance? Resistance is the opposition to the flow of electrons in a circuit through a conductor. In the illustration below, electrons flow in a synchronized and orderly manner. In reality the atoms will not be aligned so well and they will also vibrate tiny amounts causing electrons to collide. As the electrons collide they…
-
AC and DC Voltages
Batteries are sources of Direct Voltage meaning the pressure it provides moves the electrons in a constant current in one direction, like the flow of water down a river. Direct voltage is usually represented with a capital V with some dots above it and a small horizontal line. If we plotted this voltage against time,…
-
Voltage Labels
We measure the potential difference or voltage with the unit of Volts and we use the symbol of capital V to show this. If you look on your electrical appliances you will see a number next to a V, indicating how many volts the product is designed for. In this example the manufacturers of this usb hard…
-
Voltages Connected With Piece
If we connect a piece of wire to both terminals of a battery then the pressure of the battery will force the electrons to flow in the same direction along the same path. We can then place electrical components in the path of these electrons to do work for us, for example we place a…
Got any book recommendations?