MCQOPTIONS
 Saved Bookmarks
				| 1. | 
                                    The especially designed semiconductor diodes used as indicator lamps in electronic circuits are___________? | 
                            
| A. | The switch | 
| B. | The light emitting diode | 
| C. | The photo diodes | 
| D. | Solar cells. | 
| Answer» C. The photo diodes | |