Question

a)
Ques.3- The value of charge q at the centre of two equal and like charges Q so that the three are
equilibrium is:
a)
b) +Q/4
c) -Q/4
d) Q2
Oues.4. When an electric dipole is placed in a uniform electric field, it experiences-​

Answer 1

Answer:

A

Explanation:

At equilibrium, net force will be zero, hence

∴  

4πε  

0

​  

 

1

​  

×  

(r/2)  

2

 

Qq

​  

+  

4πε  

0

​  

 

1

​  

×  

r  

2

 

Q  

2

 

​  

=0

4q=−Q or q=−  

4

Q

​  

.