Scientists have developed high-tech yarns for generating energy. They do so when they are twisted or stretched.
Invented by Ernest O. Lawrence, in 1934, cyclotron is a kind of particle accelerator (a machine which uses electromagnetic fields for propagation of charged particles to approx light speed and contain them in a well-defined beam) in which the charged particles get accelerated in an outward direction from the centre, following a spiral path.
We all are aware of revolutionary technology – visa debit and credit cards. Now similar cards are flooding the market. We swipe our card through the card swiping machine or card reader and our transaction is done. Super cool technology! Isn’t it? But have you ever wondered what is the technology used behind it? We all might have seen a black strip at the back of the card. This is a magnetic strip which produces electromagnetic induction and card reader uses this to determine the card details. Sounds interesting?
How does electricity flow in a conductor? It is because of the potential difference across the conductor. How is this potential difference measured? It is measured with a device called voltmeter.
A transformer is basically an electric device intended to transfer electric power from one electric circuit to another, without changing its frequency. Most widely used are the transformers for transmitting electric energy to houses from power stations, while others may be used in electronic appliances for the purpose of regulating voltage. Voltage needs to be regulated because the electrical appliances’ requirement is different from that of the electric current supplied. Hence regulators are fitted along with appliances to control the supply of current to avoid any short circuiting.
Our life is incomplete without electricity. Whatever we do, be it watching television, working on laptop, using tube lights for light, using microwaves, charging batteries for our cars or vehicles, all of these need electricity. At the end of the month, we get an electricity bill which we need to pay. We need to pay for the amount of electricity we have used. How do we measure the amount of electricity used by us? We use ammeter for this purpose.
An electron that travels through wires of the external circuit witnesses resistance. Resistance is termed as the hindrance to the flow of electric charge. The electron does not travel from one terminal to another in a linear direct route. Instead, it follows a zig-zag path resulting from countless collisions with fixed atoms inside the conducting material.
A good conductor allows the electric current to pass through it freely while an insulator does not allow the electric current to pass through it. Conductors are mostly metals like copper. Insulators are mostly non-metallic solids which have extremely high resistance towards the flow of charge and do not allow the charge to flow through them.