When two bodies A and B are rubbed against each other and A acuires a charge +Q then the charge on B

Dear student,
When two bodies are rubbed against each other the exert an equal amount of charge because the -electrons get transferred into the opposing body and same happens with the +protons. Therefore, when two bodies A and B are rubbed against each other and A acquires a charge +Q then the charge on B will be -Q.

Regards