Question

(b) An electric dipole of charges +1 u Cand-1 u Chaving a dipole length 5 cm is
placed in an electric field of intensity 3 * 10% N/C. What will be the torque required

​

Answer 1

Answer:

The Electric field is given as

E=  

R  

2

 

KQ  

2

 

​  

 

Then the distance between the charges are as follows

R  

2

=  

4×10  

4

 

9×10  

9

×(3×10  

−6

)  

2

 

​  

 

On solving we get the distance between the charges

25mm

Hence the dipole length is 25mm