Raja – Minister Rajan, you’ve been engrossed in that book for hours. What are you searching for, leaving the scenic views outside?

Mantri – Found it, Your Majesty, found it!

Raja – What have you found, tell me too!

Mantri – I’ve found a source of free electricity, now you won’t be stingy anymore, it’s time for you to become rich!

Raja – oh my goood !Money 🤑💸💵💴💶💰💳

Mantri –According to Faraday’s law, if we change the magnetic field in a conducting loop, an EMF is generated which causes electric current to flow. I am thinking that if we install some magnets on the train and many copper loops around the track, then whenever the train moves, the magnetic field inside the loops will change, generating current in the copper loops. It’s a one-time investment in installing metal loops, and then we can generate free electricity as the train passes by.”

Now the entry of real hero! Gurujii padhar rhe hai

Guruji – Minister, have you not read the Energy Conservation Law?

Mantri – i have read!!

“Guruji – Energy cannot be created or destroyed. It can only be changed from one form to another. So, how did you create energy here? Oh wait, it’s from the movement of the train, meaning kinetic energy… in that case, the train’s kinetic energy would have to decrease.”

Mantri – Is that so? So you’re saying that Faraday’s theory is incomplete?”

Guruji – No, your knowledge is incomplete.”

“Guruji – Just as a changing magnetic field produces a current, moving charges also generate a magnetic field. And you can determine the direction of this field using the right-hand thumb rule.
In your setup, the current produced in the loop will create a new magnetic field. And this magnetic field will be exactly opposite to the field of the magnets placed in your train.
Now, a repulsive force will act on this magnet from the front, and an attractive force will act on it from the back. This means a net force will act on the train in the backward direction, which will slow it down.”
Mantri – So what happened? We’ll make the train even faster! We’ll increase the engine’s power and compensate for it.”

“Guruji – The current in the copper loops will increase even more, and so will the opposing magnetic field. If you pay attention, you aren’t creating free energy here; instead, you’re transferring the train’s energy, which is coming from fuel or electricity, into the loop. This means that even in Faraday’s law, energy conservation is at work. Exactly, it means you are converting energy from one form to another.”

Minister – My genius idea has failed!”

Guruji – Nothing is free in this world

Raja – Such excellent knowledge was received for free, right here on Mahashree Tech!”

“Guruji – When we talk about the conservation of energy,generally the conversion of potential energy and kinetic energy comes to mind. But even in electromagnetic induction, we can explain the conservation of energy with the help of Lenz’s law and Faraday’s law. If you pass a magnet through the open loop of a wire, no electric current or electric energy will be generated in it. Therefore, there will be no opposing magnetic field either. So, we won’t have to do any work against any force to move the magnet back and forth. And the electric energy generated is also zero.
But as soon as you close this loop, a current will be generated in the loop along with the movement of the magnet. And this current will generate an opposing force, against which you will have to move the magnet. That is, the more physical work you do against this force, the more electrical energy will be generated in the loop.”

Raja- “My dream of becoming rich feels shattered.