Question

A photocell is used to automatically switch on the street lights in the evening when the sunlight is low in intensity. Thus it has to work with visible light. The material of the cathode of the photocell is (A) zinc (B) aluminium (C) nickel (D) potassium

Answer 1

Answer:

here is your answer dear

nickel

Answer 2

Answer:

The material of the cathode of the photocell is (D) Potassium

Hope this helps! :D