Question

A photoelectric cell converts-
A. Light energy into heat energy
B. Light energy into sound energy
C. Light energy into electric energy
D. Electric energy into sound energy

Answer 1

To solve the given question where it is being asked that a photoelectric cell convert which type of energy to another we know that photo means light so it will something surely be related to light and also we will discuss what is the use of these photoelectric cells so, they will convert light energy to electrical energy.

Complete step-by-step solution:
In the above question it is asked that photoelectric cells convert which form of energy to another. For this we will first discuss what are photoelectric cells then we will think of which energy is converted to another.
We know that “Photo" means light, so photoelectricity simply means electricity produced by a light beam and a photoelectric cell will be the cell which produces electricity by light beam.
Photoelectric cells are also called photocell, these are devices whose electrical characteristics like current, voltage, or resistance vary when light is incident upon them. The most common type of photoelectric cells consists of two electrodes that are separated by a light-sensitive semiconductor material that is silicon. A battery or other voltage source connected to the electrodes sets up a current that is even in the absence of light as when light strikes the semiconductor section of the photoelectric cell then the current in the circuit increases by an amount that is proportional to the intensity of the light
A photoelectric cell has another name too that is a phototube, electron tube, or electric eye, is an electronic device that is sensitive to incident radiation, especially visible light, which is used to generate or control an output of electric current.
From the above discussion we got to know that photoelectric cells are the device that are used to convert light energy of the sun into electrical energy therefore we can say that Option(C) is the correct answer of the given question.

Note: Photocells also called phototubes were originally used as the light detectors too, but they were relatively cumbersome, elaborate, and expensive. Also they were smaller and cheaper electronic components like LDRs that are now widely used as light-detectors instead.