Check this out everyone, sir I think there a mistake in onestep of derivation. Sir, you cannot substitute b in k1/k2 because k1 have p where as k2 doesn't have.if you want to substitute b in place lo k1/k2 we have to add 1/p on numerator and denominator. Then k1 will have p and k2 will have p, now you can take p as common from it like this ((k1)/(k2)).p...now we can substitute the value of k1/k2 as b.
I am a student of class 12 . And i hadnt heard anything like dlvo before watching your video. Can you tell me its application in any type of problem or how a question can be asked relevant to that topic.