Verifying Coulomb's Law: Q1, Q2 & R

In summary, the given conversation involves a person asking for help with Coulomb's law and double checking their calculations. The conversation includes clarification on the units of charge, a correction on the given data, and confirmation that the solution is correct.
  • #1
Tony Tesla
5
0
Hi, Can someone help me with this question? I understand Coulomb's law but i want to know if I am doing it right.
So the charge of
Q1= 2 mC
Q2= 1 mC
And R= 5 cm (0,05m)
This is how i solved it.
F= K(8,988x10^9) x (2x10^-6)x(1x10^-6) / (0,05m)^2
F= K(8,988x10^9) x 8x10^-10
F= 7.1904 N

Is 7.1904 the right answer?
 
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  • #2
Tony Tesla said:
Hi, Can someone help me with this question? I understand Coulomb's law but i want to know if I am doing it right.
So the charge of
Q1= 2 mC
Q2= 1 mC
And R= 5 cm (0,05m)
This is how i solved it.
F= K(8,988x10^9) x (2x10^-6)x(1x10^-6) / (0,05m)^2
F= K(8,988x10^9) x 8x10^-10
F= 7.1904 N

Is 7.1904 the right answer?

Hi Tony Tesla...

Welcome to PF!

1mC = 10-3C , not 10-6C

Please recheck your calculations.
 
  • #3
Submultiples Multiples
Value Symbol Name Value Symbol Name
10−1 C dC decicoulomb 101 C daC decacoulomb
10−2 C cC centicoulomb 102 C hC hectocoulomb
10−3 C mC millicoulomb 103 C kC kilocoulomb
10−6 C µC microcoulomb 106 C MC megacoulomb
10−9 C nC nanocoulomb 109 C GC gigacoulomb
10−12 C pC picocoulomb 1012 C TC teracoulomb
10−15 C fC femtocoulomb 1015 C PC petacoulomb
10−18 C aC attocoulomb 1018 C EC exacoulomb
10−21 C zC zeptocoulomb 1021 C ZC zettacoulomb
10−24 C yC yoctocoulomb 1024 C YC yottacoulomb
Common multiples are in bold face.

Source: http://en.wikipedia.org/wiki/Coulomb

I think it is 10^-6

Now i see it i typed Mc instead of μC
Sorry
 
  • #4
Tanya Sharma said:
Hi Tony Tesla...

Welcome to PF!

1mC = 10-3C , not 10-6C

Please recheck your calculations.

I see now, I ment μC not mC sorry.
 
  • #5
Tony Tesla said:
I see now, I ment μC not mC sorry.

Even then your calculations are wrong.

Recheck...
 
  • #6
Tanya Sharma said:
Even then your calculations are wrong.

Recheck...

checked it 5 timed every time the answer was 7.1904 N
After that i went to this page: http://www.endmemo.com/physics/coulomb.php
and the answer there was also 7.1904 N
 
  • #7
The solution for the force is correct if the charges are given in μC .

ehild
 
  • #8
ehild said:
The solution is correct if the charges are given in μC .

ehild

Thank you
 
  • #9
Yes...your solution is correct.I misread the given data.
 

1. What is Coulomb's Law?

Coulomb's Law is a fundamental law in physics that describes the electrostatic interaction between two charged particles. It states that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

2. What are Q1, Q2, and R in Coulomb's Law?

In Coulomb's Law, Q1 and Q2 represent the charges of the two particles, and R represents the distance between them. Q1 and Q2 can be either positive or negative, depending on the type of charge the particles possess. R is measured in meters.

3. How do you verify Coulomb's Law experimentally?

To verify Coulomb's Law experimentally, you can use an apparatus called a Coulomb's Law apparatus, which consists of two charged spheres and a device that measures the force between them. By varying the charges and distance between the spheres and measuring the force, you can verify that it follows the mathematical relationship described by Coulomb's Law.

4. Can Coulomb's Law be applied to all charged particles?

Yes, Coulomb's Law can be applied to all charged particles, regardless of their size or composition. It is a fundamental law in physics that governs the behavior of charged particles.

5. What are some real-life applications of Coulomb's Law?

Coulomb's Law has many real-life applications, including in the design of electronic devices, such as capacitors and transistors. It is also used in the study of electricity and magnetism, as well as in fields like electrochemistry and materials science. Additionally, Coulomb's Law is used in the development and functioning of technologies such as lasers, printers, and x-ray machines.

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