BPSC – Combined Competitive Examination · প্রশ্ন 133
Which material is used for smart film?
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (A) Indium tin oxide
ব্যাখ্যা
Smart (PDLC) films sandwich liquid crystals between ITO-coated layers that carry the switching voltage.
- (A) সঠিক
Correct: ITO is a transparent conductor used in smart (switchable) films and touchscreens.
- (B) ভুল
Wrong: not conductive or transparent for this use.
- (C) ভুল
Wrong: not used for smart films.
- (D) ভুল
Wrong: silica is an insulator, not the electrode layer.