Question

Which of the following are photocells?
(i) Photoemissive cells
(ii) Photovoltaic cell
(iii) Photoconductivity cell
(iv) Solar cell

• A. (i), (ii)
• B. (iii), (iv)
• C. (ii), (iii) and (iv)
• D. (i), (ii), (iii), (iv)

Answer 1

The correct option is D (i), (ii), (iii), (iv)

(i), (ii),(iii) and (iv)

Photo cells are sensors that allows you to detect light. Photo cell transfer light energy directly into electrical energy. They are small, inexpensive, low power, easy to use and don't wear out. Photoemission cell, photovoltaic cell, photoconductivity cell, solar cell etc. are examples of photocells.