Judicial Magistrate R B Pal sent them to judicial custody for 14 days after Sinha and others refused to take bail.
Sinha and others were arrested yesterday after JSEB's Hazaribagh branch General Manager Dhanesh Jha filed an FIR, accusing them of tying him up during a demonstration on electricity crisis by the BJP's district unit here.
Sinha had admitted before the media yesterday that he had "instructed" the party's women activists to tie up Jha using a rope.
"Yes, I asked them to tie the hands of the GM as women are the worst sufferers for not getting power. Their children's education is also suffering," Sinha had told reporters.
The Dy SP had rescued Jha from the women.
Jha had said that the incident was "humiliating and insulting."