Beta, jaisi chumbak neechay pipe mein girta hai, toh uska force copper mein current paida karta hai. Ye current ek aisa magnetic field banata hai jo chumbak ko roakne ki koshish karta hai — bilkul energy bachane ke liye. Jaise meri choti student Radha ne pehli baar teen taal sahi bajayi, toh uski khushi aur uski mehnat dono bach gaye — bekar nahi gayi. Lenz ka niyam bhi yahi kehta hai: koi bhi energy vyarth nahi jaati, bas roop badal leti hai.
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