Question

For what purpose LEDs are used in the circuit?

• A. LEDs are used to produce high feedback current
• B. LEDs are used to give a visual feedback from the circuit
• C. LEDs are used to control the current
• D. LEDs are used to control the voltage

Answer 1

The correct option is B LEDs are used to give a visual feedback from the circuit

A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable current is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.LEDs are used to give a visual feedback from the circuit