Question

Selenium has the unusual property of being a good conductor in light but a poor conductor in the dark. It was, therefore, used in making.

• A. Shaded glass
• B. Photo-electric cells
• C. Photo chemical celles
• D. Chromatic lenses

Answer 1

The correct option is B Photo-electric cells

Since, selenium is a good conductor of electricity in light, but poor conductor in dark.

$\therefore$ It is used in photo- electric cells.

Since, photocell is an electronic device which works on the principle of photo electric effect and convert light energy into electrical energy.