The options attached to the question above are as follows:
A. Light-Emitting diodes are used as indicators in circuits
B. Light-Emitting diodes are used as defectors in circuits
C. Light-Emitting diodes have very short life-spans in circuits
D. Light-Emitting diodes conduct current in either direction in circuits
ANSWER
The correct option is A.
Light emitting diodes [LED] refers to a semi conductor diode that glows when current flows through it by converting electrical energy into light. LED has many applications and one of it is that is used as an indicator in electric circuits. The circuit symbol of LED is made up of two arrow marks, which is used to indicate the radiation that is emitted by the diode.