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A Wind Turbine is a device which uses kinetic energy of blowing wind to generate electrical energy. A wind turbine consists of two or three rotor blades which are mounted on a rotor. When the blowing wind exerts a lift and drag force on these blades, the rotor starts rotating. A main shaft is attached to the rotor which is connected to an electric generator on the other end. The generator produces electricity when driven by the wind turbine. Depending on the axis of rotation, the wind turbines are classified into two types − Horizontal Axis Wind Turbine Vertical ... Read More
A magnetic material is a type of substance or material which gets attracted towards a magnet. The magnetic material also acquires magnetization when it is placed in the magnetic field of a magnet. Depending on the magnetization property, there are two types of magnetic materials namely, Hard Magnetic Materials Soft Magnetic Materials Let's start with some basics of hard and soft magnetic materials. What is a Hard Magnetic Material? Hard magnetic materials are those types of magnetic materials that maintain a constant magnetic property after magnetization at once. Therefore, the hard magnetic materials are sometimes also termed as ... Read More
Force is a physical quantity which is defined as a pull or push of a body having certain mass. Force is the factor that causes a change in the velocity of a body. Basically, a force is an external agent causes the change in the state of an object, i.e., it may move the object or may stop the movement of moving body. Force is a vector quantity. Thus, it has both magnitude and direction. Force may be classified into two broad categories namely contact force and non-contact force. Contact force is the one that acts on a body ... Read More
Electric current and Electric charge are the two most fundamental electrical quantities in any electric circuit. The major difference between current and charge is that the electric charge is the subatomic property of all the materials in nature, while the electric current is the direct flow of electric charge in an electric circuit. There are several other noticeable differences between charge and current which we are going to highlight in this article. Let's start with some basics of electric charge and electric current so that it becomes easy to understand the differences between them. What is Electric Charge? Electric charge ... Read More
Both Charge and Mass are physical properties that every matter possesses in the universe. Charge is the property of matter by virtue of which it shows electric effect. Mass is the property which gives measure of substance of a body. Also, Charge is the property that results in the electrostatic forces. On the other hand, Mass is the property that results in the gravitational forces. Both Charge and Mass are scalar quantity having magnitude only. Consequently, both are added as real numbers. In this article, we will discuss all the major differences between charge and mass by considering various parameters ... Read More
A servo motor is a special type of electric motor which is used as a rotary or linear actuator for precise control of angular or linear position, velocity, acceleration and many other closed-loop position control applications. Servo motors are designed with long rotor length and small diameter. Thus, due to low inertia, the servo motors have a high speed response. A typical servo motor consists of a motor, feedback system, controller, etc. Where, it uses the position feedback to control the speed and final position of the motor. The servo motor is equipped with an encoder or a speed sensor ... Read More
We use event handlers to simulate keypress events in JavaScript. An event in JavaScript, as the name suggests, refers to actions taken by the browser or user. An event handler is a utility that JavaScript provides, that lets the programmer implement the correct course of response to those events. We will be using the jQuery library to simulate keypress events in JavaScript. It is a library for JavaScript to traverse HTML documents as well as manipulate them, create animations, and much more. One such feature is event handling that we will be using. Event An Event is a change that ... Read More
We can set cookies for a specific page only using JavaScript. We use the path attribute of the document.cookie property to set the cookie on a specific webpage. Cookies are small text files (4 KB) that store important information such as username, email, session id, and other preferences that help customize the webpage for a particular user. Something so trivial as this is a user preference and thus can be conveniently stored in a corresponding cookie file. The pathname property of the Window location returns a string containing the path of the current webpage. The path is basic information about ... Read More
We use the links property of the document object to show the number of links in a document with JavaScript. The document object, part of the DOM, corresponds to the current web page that the browser has loaded. It Contains all the information about the condition of the browser as well as the web page. The links is a property of the document object that returns a list of all the hyperlinks present in the HTML document. A hyperlink may look something like this − "https://www.tutorialpoints.com/php" The links property of the document object lists all HTML elements having href ... Read More
We use the selectedIndex property in JavaScript to show the index of the selected option in a dropdown list. We use the id of the dropdown list to access the element using JavaScript and then call selectedIndex on it to get the index of the selected option in the dropdown list. Dropdown lists are an important part of user interface utility. It is a list of options from which one or multiple options can be selected by the user. These responses to these dropdown lists are then collected and the required course of action is taken by the user. A ... Read More