Two unlike charges separated by a distance of 1m attract each other with a force 0.108N. If the charges are in the ratio 1:3, the weak charge is?A. 2 micro C ,B. 4 micro C, C. 6 micro C, D. 5 microC

2 years ago

Share

Answers : (4)

                                        

Here q1:q2=1:3,


3q1=q2,


we know F=k(q1q2)/(r2)


where k=9x109N-m2/C2


thus 0.108=9x109(3(q2)2)/12


q2=2x10-6C


therefore the weak charge is 2micro C.

2 years ago
                                        

i think it is 2 microC

2 years ago
                                        

let charges be x,3x;


 


f=3x*x*9*10^9          =>x= 2 micro

2 years ago
                                        

The answer is 4 micro C. But it could be wrong.

2 years ago

Post Your Answer

More Questions On Electrostatics

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
what is mean by electric dipole?
 
 
Hello, An electric dipole is two charged objects, with equal but opposite electric charges, that are separated by a distance. Thanks & Regards Sumit Majumdar, askIITians Faculty Ph.D,...
  img
Sumit Majumdar one year ago
 
Two equal and opposite small charges which are seperated by a small distance is called an electric dipole.
 
Arbaz IIIT one year ago
 
a dipole with equal and opposite electric charges
 
KOPPULA ANIL one year ago
See attachment. Calculate Ceq and explain with full solution
 
 
Hi, Simplify the circuit and it seems like C,C,C/2 and C/2 are connected in parallel. So, Ceq= 3C...
  img
Shobhit Varshney 27 days ago
 
Ceq is 2C
 
Shivam 27 days ago
See attachment. Calculate Ceq and explain with full solution
 
 
The 5 capacitances in the mid are forming a wheatstone bridge. So, if a test battery were to be applied, the curent wouldn’t pass through the vertical C in the middle as it is a...
  img
Ravi 27 days ago
Why are the pole pieces of a magnet made concave ?
 
 
By making pole pieces concave and using iron cylinder, the field is made radial, so that the plain of the coil becomes parallel to the magnetic...
  img
Harishwar one month ago
explain me about anamolous expansion of water
 
 
water expands as the temperature rises but its density is maximum at 4 C . it means it has lowest volume at this temperature . This is why when temperature goes down after 4 C . Upper layer...
 
neeraj agarwal 10 months ago
how to prove and derive F=qvBsin(x)........this formula is given directly in books
 
 
B is the magnetic flux density I ( current ) = rate of flow of charges = q / time so , F = B L ( q / t ) sin theta L / t = V ( velocity ) so , F = B q V sin theta that's it :) Thanks &...
  img
Rinkoo Gupta 6 months ago
View all Questions »