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