CONVERSION
This will change AC current to DC current
What is a rectifier
What are the three types of measurements associated with AC voltage?
Peak voltage
Peak-to-peak voltage
RMS voltage
If your application requires that the power supply voltage be maintained within 5% from no-load to full-load, what type of power supply would you use?
Regulated
If a diode is forward biased, the resistance to current flow will be high (T/F)
False, the diode will exhibit low resistance, allowing the current to pass through the diode.
Describe the function of an inductor
An inductor will smooth the current flow.
Half wave rectifier converts both halves of AC current to DC (T/F)
False, Only converts 1/2 of cycle to DC
Power supplies that are regulated provide a more constant voltage (T/F)
True, regulated power supplies will minimize the drop in voltage as the power supply is loaded.
What is the purpose of a voltage divider circuit?
A voltage divider circuit allows you to get more than 1 voltage from the source.
What does the characteristic curve show for a diode?
It shows the response if the diode under forward and reverse bias conditions (positive or negative voltage applications)
If the primary winding on a transformer has 1000 turns, and the secondary has 2000 turns, what type of transformer is it?
This is a step-up transformer. The voltage on the secondary side will be twice the voltage of the primary
AC voltage is stated as RMS voltage, not peak to peak.
(T/F)
True
What type of instrument is used to test a diode?
Multimeter
If the output voltage from the power supply changes when the input voltage changes, what type of power supply is it?
Unregulated power supply
If the depletion region in a diode is closed, current will be blocked (T/F)
False, when the depletion region of the diode is closed, current will flow.
What happens when a conductor is moved through a magnetic field?
An electrical current is produced in the conductor
If a diode is reverse biased, current will flow (T/F)
False, a diode must be forward biased to cause current to flow
What does PIV stand for?
This is the the peak inverse voltage that a diode can withstand without being destroyed. This is the peak reverse bias before damaging the diode.
All diodes have a current limit that they can carry. What determines this limit?
The temperature rise of the PN junction will be excessive and the diode will be destroyed.
What type of rectifier uses only 1/2 of the sine wave of an AC current
Half wave rectifier
a DC voltage can be supplied by a transformer (T/F)
False, the transformer us used to change the incoming AC voltage to a different voltage,
What type of circuit would be used to obtain DC from an AC source?
A rectifier circuit
A capacitor is an electronic device that blocks AC current and allows DC current to pass through it (T/F)
False, a capacitor allows certain frequencies of AC to pass, while blocking DC current
Define what the breakdown voltage is in a Zener diode.
This is the voltage at which the diode will start conducting when it is reversed biased.
If both halves of the AC sine wave is used to convert to DC, what type of rectifier is this?
Full wave rectifier
What is created in the immediate area of a conductor when an electric current flows
A magnetic field is created, proportional the the amount of current