Physics 35 Coulomb's Law (7 of 8) Example 3 (Challenging Problems)

In this video I will find the original charges of the 2 charges at a d = 1.1m apart.

Nest video in this series can be seen at:

[ajob_kaktarua]

At 4:40, we have
Q1-Q2=something,
Q1*Q2=something.
Now, we know that,
// (Q1+Q2) square = (Q1-Q2) square + 4*Q1*Q2 //
We now have the value of both, (Q1+Q2) & (Q1-Q2).
Q1 & Q2 can be determined easily!
Simple calculation!

[pi_rand]

Sir, great to see your lectures ...you are

Sir actually this method involves a lot of calculations....instead we can find the ratio b/n charges ie Q1*Q2=4Q3^2....


As we know when the charges are touched .charges ae transferred till they are of same charges....ie Q1=Q3+x and Q2 = Q3-x

now we can equate and finally get the

THANK YOU SIR !

[aprabhat]

Sir i am belongs to india🇮🇳. And I just watch this vedio totally change my mind 🙏🙏

[oszkarbiro]

Sir, first of all thank you for your videos even in 2021. I have a remark though, wouldn't be simpler if we've just express Q1 as Q2/C1? The we can substitute this into the equation of (Q1-Q2)^2=4C2. We get a relief of a little bit shorter algebra, and since we do not lose any roots the solution will be exactly the same. Can it be a mistake to suppose that either Q1 or Q2 cannot be zero?

[RiyaTomar-jdmw]

Sir, if the negative charge has a greater magnitude than the positive the remainder would contain the negative charges, right?? because then it would be Q2-Q1.
Also, when two charges are brought in contact is it induction....when the charges are neutralized?

[jatinrathore]

Sir, if Q2 is also a positive charge but with a lesser magnitude than Q1 then what will Q3 be equal to?Will it be Q1+Q2/2?

[SantanaSummer]

This was so helpful! 🙌 thanks you the man

[xvgx]

Why when finding out F1, you multipy Q1 and Q2. But for F2, you are squaring Q3? I thought you had to multiply the two q's( Q1 and Q3) to find F2.

[umukunzitimothee]

thank you sir, your videos are more helpful. I was just less in engineering physics, few days after watching your videos, i totally improved. but sir where I can get your PDF notes, I hope it will help me more. thank you.

[phuti]

could you please explain the neutralizing q2 part why did you minus and not plus and why are you neutralizing q2

[shirus]

Hi, thank you so mach for the video!
you do (Q1-Q2)/2=Q3 because one of the charges is negative and the other one is possitive?

[Mushyrulez]

You didn't add 5 of 5 into the playlist!

[nikhilwardrobe]

When you will be adding the fifth video?

[hypnotize]

When the video is at 6:30, you are adding 4C2( 4 c subscript 2) + 2C1 (2  c subscript 1)= C3 (c subscript 3), how?