Is it compulsory that non-contact forces are having both the properties, i.e., attraction and repulsion?
Yes, it is compulsory that non-contact forces are having both the properties, i.e., attraction and repulsion as both these properties depend on the charge or pole of the object. The object having positive charge will attract a negatively charged object and the same object with positive charge will repel another positively charged object. Thus both attraction and repulsion are there in the same object.
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