1.

An electric dipole made up of a positive and negative charge, each of 1 mu Cseparated by a distance of 2cm is placed in an electric filed of 10^5 N//C, then the work done in rotating the dipole from the position of stable equilibrium through an angle of 180^@ is

Answer»

`2 xx 10^(-3)` Joule 
`2 xx 10^(-8)` Joule 
`4 xx10^(-3)` Joule 
Zero

Answer :C


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