Voltage Regulators - Chapter 17

What is the main function of a voltage regulator?

• Increase the input voltage

• Maintain a constant DC output voltage

• Convert AC voltage to DC voltage

• Reduce power consumption

Where is a voltage regulator typically placed in a power supply?

• Before the rectifier

• After the rectifier or battery

• In parallel with the load

• Between the transformer and rectifier

Which of the following is NOT a type of voltage regulator?

• Series regulator

• Shunt regulator

• Switching regulator

• Pulse regulator

Which series of voltage regulators provides a negative voltage output?

• 78xx

• 79xx

• LM317

• LM340

What is the output voltage of a 7805 voltage regulator?

• -5V

• +5V

• +9V

• -9V

What is line regulation?

• The ability of a regulator to maintain output voltage despite changes in input voltage

• The ability of a regulator to maintain output voltage despite changes in load current

• The ability of a regulator to supply power to multiple loads

• The ability of a regulator to convert AC to DC

What does a lower line regulation percentage indicate?

• Better voltage stability

• Poor voltage stability

• Higher output fluctuation

• Increased power dissipation

What does load regulation measure?

• The change in output voltage due to variations in input voltage

• The change in output voltage due to variations in load current

• The power efficiency of a regulator

• The ability to supply high current loads

A 78xx series regulator provides which type of voltage output?

• Positive

• Negative

• Both positive and negative

• AC

What type of voltage does an adjustable voltage regulator provide?

• Fixed voltage

• Adjustable voltage

• Negative voltage

• Switching regulator