Magnetic flux

serve as the ‘brain’ or ‘memory centre’ of everyday electronics. Regardless of the size, the principles of all hard drives are the same. They hold large amounts of data using magnetism. A typical hard drive is made up of a platter (metallic and magnetic disk) that is divided into…

Ohm’s law is the basic rule of the electricity that explains the relationship between electric current, voltage, and resistance. The ohm’s law was named after the German physicist Georg Ohm who discovered this rule or law. Ohm’s law statement Ohm’s law states that the electric current flowing through a conductor is directly proportional to the voltage and inversely proportional to the resistance. In other words, the electric current flowing through the conductor increases with increase in…

1.1. BLOCK DIAGRAM CHAPTER 2 2.1. COMPONENTS • Arduino – Purpose of processing • Voice Recognition Module – Voice command identification • Motor controlling Circuit – Motor Control • Gear Motors – Direction variation & constant speed running 2.1.1. ARDUINO Arduino Mega contains everything needed to support the function of the micro controller. It includes digital output/input pins & analog input pins. It connects to a computer through USB cables or power it by a use of AC…

1.0 Introduction A wire is defined as a single, flexible strand or rod of metal which is typically cylindrically-shaped. The core applications of wire, both single- or multi-stranded wire, are to withstand or carry mechanical loads in construction sector, whereas in electrical and electronic field are used to transmit electricity and telecommunications signals. For examples, from view of construction, wires are either braided or fixated together to form a bundle of strands, namely…

What chracterizes the axial flow turbine is its rotation axis. It could be placed vertically or horizontally to water surface. In this latter type the axis is parallel positioned to the incoming water stream. Also the generator can be submerged under water or non-submerged. This turbine is usually used as tidal energy converter. For small river use, the axis could be an angle inclined to the water stream. See figure \ref{Hydro_HorizontalAxis}. Hydrokinetic converters with a vertical axis…

Occupational Exposure to Ionizing Radiation in Interventional Cardiology Practices in Bangladesh during 2010-2014 M.S. Rahman*, A. Begum, R.K. Khan, A. Hoque, and M.M.M. Siraz Health Physics Division, Atomic Energy Centre, 4 Kazi Nazrul Islam Avenue, Shahbag, Dhaka-1000 *Corresponding author: Dr. Mohammad Sohelur Rahman Principal Scientific Officer Health Physics Division Atomic Energy Centre 4 Kazi Nazrul Islam Avenue Shahbag, Dhaka-1000 Cell Phone: +880-1827328238 e-mail:…

Investigation Hooke’s Law AIM: To investigate how a spring behaves when a force of load stretches it. To figure out the relationship between the loads added to spring and the extension of spring. HYPOTHESIS: I think that as the load added to spring increases, the extension of the spring will increase. The relationship between them will be directly proportional. The formula of these two variables might be F=kx. F stands for the load added to spring, k is spring constant and x stands for…

Model Scenario During recess on a sunny August afternoon, I noticed several of my students gathered together on the sidewalk. I walked over to see what the fascination was about, and found that one of the students had several types of magnets and other materials. The students appeared to be genuinely interested in discovering what would and would not attract to the different types of magnets. Once we returned to the classroom, several students made statements about characteristics and…

Wheatstone bridge is a device used to measure unknown resistance by passing current through the resistor [1]. Wheatstone bridge is made up of a power source and galvanometer that joins the two-parallel circuits which contains two resistors each. It is very useful in finding small resistances and is used in various applications such as strain gages. The following figure shows the arrangement of a Wheatstone bridge. Figure 1: Arrangement of a Wheatstone Bridge [1] Importance of Wheatstone…

Magnetism is when an object has a magnetic force, field, or a pull on another object.Temperature plays a large role in the strength of magnetism, and more importantly how a magnet reacts towards temperature. One can describe temperature as how hot or cold an object is. Temperature is ultimately how fast the molecules in an object are moving. The faster the molecules in an object are moving, the more heated the object becomes. Magnetism is when an object has a magnetic force, field, or a pull…