Two objects having positive and negative charge but the quantity of the charges are same. If the two objects are placed in vacum at a distance then the objects will repel or attract each other?

I think, by vacuum you mean air practically. In practice , we take dielectric constant of air equal to 1. Though it's value is 1.00054.

The electric force nature will remain same.

 

Hence attracted

Dear student 

Yes, any body charged with positive or negative charge when brought near a neutral body will induce an opposite charge into the surface near to it and hence, will experience a force of attraction.

Hope ths helps 

Good Luck 

opposite charges repel each other irrespective of nature of surrounding 

make clearr this concept unlike attract 

like repel

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