Tech Rumination by Anirudh Vempati

Have you ever wondered why, even though our bodies can conduct electricity, we can't be part of a small LED circuit? Firstly, it's true that our bodies can conduct electricity because they contain lots of water and salts, which are good conductors. However, for an LED circuit to work properly, it needs a very specific amount of electricity. Our bodies cannot control how much electricity they conduct, so if we were part of an LED circuit, we might let through too much or too little electricity. This could either break the circuit or not let the LED light up. Our bodies have resistance, which means they resist the flow of electricity to some extent. This resistance is actually good for us because it protects us from getting hurt by small amounts of electricity. So, while we can conduct electricity, we're not suited to be part of an LED circuit like a copper wire would be. It's important to always be safe around electricity! So, while our bodies can conduct electricity, th...

 If you have ever wondered what is inside a non-rechargeable AA battery, this blog post will give you some answers. Non-rechargeable batteries cannot be recharged once they are depleted. They are commonly used in devices that require low to moderate current, such as remote controls, flashlights, toys, and clocks. There are different types of non-rechargeable AA batteries, depending on the chemistry of their electrodes and electrolyte. The most 2 common ones are: Alkaline batteries : These batteries have a zinc anode and a manganese dioxide cathode, with an alkaline electrolyte of potassium hydroxide. They have a nominal voltage of 1.5 V. They are widely available and relatively cheap.   Lithium iron disulfide batteries : These batteries have a lithium anode and an iron disulfide cathode. They have a nominal voltage of 1.5 V. They are more expensive than alkaline batteries, but they offer longer shelf life and better performance in low temperatures. They are often used in ...

Tech Rumination by Anirudh Effects of Electric Current  Did you know that electric current has different effects? In this Blog Post, we are going to explore the three effects of electric current: the heating effect , the magnetic effect , and the chemical effect . Heating effect of electric current : When electric current passes through a conductor, it produces heat, which is known as the heating effect of electric current. Electric bulbs produce light as the current flows through their filaments. Such bulbs are known as incandescent bulbs. Sandwich makers, geysers, and some electric kettles also use this phenomenon. In ancient engineering, a device called a fuse was used for safety, which worked with the heating effect of electric current. A fuse is a glass cylinder with metal edges, and a thin metal wire connects both the metal edges from inside. This wire melts when excess current flows through it due to the heating effect of electri...

Tech Rumination by Anirudh  A photoresistor is a type of resistor that reacts to light, also known as an LDR ( Light Dependent Resistor ). The resistance of a photoresistor decreases with an increase in light, which means it allows more current to flow. Let's make a circuit with a photoresistor. First, we need to create a simple circuit with an LED ( Light Emitting Diode ), a 1.5V battery , a few wires, and a switch. To do this, follow this sequence: connect the battery's positive terminal to a wire, then connect the wire to the switch, and another wire to the LED 's long pin. Next, connect the LED 's short pin to the battery's negative terminal . Now turn on the switch. Is the light glowing? If the LED glows, then the circuit is correct. Now, replace the switch with an LDR . Make sure the circuit is correct and that there are no polarities to an LDR . With everything in place, turn on the lights in your room. Is...

Tech Rumination by Anirudh A simple electroscope is a device that can detect the presence of an electric charge. It consists of a metal rod (typically made of copper) with a metal disc or antenna-like structure with copper wire at the top, and two thin metal leaves hanging from the bottom of the rod. The rod should have a hook-like structure at the bottom so that the aluminium leaves can hang without falling easily. The leaves are typically made of aluminium foil and are attached at the bottom of the rod inside a glass jar. When an object with an electric charge is brought close to the top part of the electroscope, the charge transfers to the metal rod and then to the leaves. If the charge is positive, electrons transfer from the leaves to the rod, leaving the leaves positively charged. If the charge is negative, electrons transfer from the rod to the leaves, leaving them negatively charged. Since like charges repel each other, the leave...