Alternating Current, An Introduction
Here are a few terms that are frequently used when we talk about AC, that is, Alternating Current. Some of them are used when talking about Direct Current as well.…
Heat and Temperature, Are They Same?
Heat and Temperature are the words we use regularly, and we keep interchanging the meanings. Yes, they are different, but how? Why do we feel hot touching a cooker on…
Artificial Magnets
We have made an introduction to magnets earlier. We read about natural magnets, and the earth's magnetic field. Now let us read about artificial magnets. What is an artificial magnet?…
Magnets, An Introduction
We all have played with magnets at some point in our childhood. Magnets have applications in many devices we use that we hardly notice them. A small introduction to magnets…
Gravitation
Why do things fall down? Why must we apply effort to make things go up? Do all things fall down at the same rate? Why do we not use an…
Electric Motor – An Overview of DC Motors
Have you seen a motor? Surely, we all have seen and used motors, from the mobile phone in our pocket to huge industries. We use motors at home and in…
Passive Elements in Electrical Circuits
Resistor, Inductor, Capacitor - These are the three passive elements in an electrical circuit. An electric circuit consists of active elements and passive elements. An active element supplies energy to the…
Factors Affecting Resistance
Resistance to electric current is present in all materials. The amount of resistance depends on certain physical factors. What are they? We will see now. Resistance means the opposition offered…
Power and Energy
In electrical engineering, we come across the terms power and energy often. As laymen, we use these terms interchangeably. Are they same or is there a difference? Let us see.We…
Moment of Force (Torque)
We see movement all around. Some of them are linear, that is, along a line. And many are rotational. Let us see the force behind rotational movement and what makes…
Exercises – Moment of Force
1. A door is 3 feet wide. Calculate the moment of force when a force of 100 N is applied ata. the end of the door b. the middle of…
Ohm’s Law
We know what is current and voltage. Is there any relation between these two? Yes. It is given by a law that is as basic as the alphabet is to…
Current Electricity
We use terms such as current, voltage, as part of our daily routine. What are they? Let us see their meanings and relationship with each other. We have seen what…
Static Electricity
We know that electricity is electrons in motion. Then what is static electricity? How is it electricity when it is static? Let us see now. As we have seen earlier,…
Basics of Electricity
Electricity is something we all have grown up with. But was it there since the beginning? No. The various devices we use such as bulbs, fans, TVs, radios, mobile phones,…