MCQOPTIONS
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				| 1. | 
                                    In the circuit of figure the function of resistor R and diode D are | 
                            
| A. | to limit the current and to protect LED against over voltage | 
| B. | to limit the voltage and to protect LED against over current | 
| C. | to limit the current and protect LED against reverse breakdown voltage. | 
| D. | none of the above. | 
| Answer» D. none of the above. | |