ECE Review 2 (IE)

How many terminals does a QUADRAC have?

• 2

• 3

• 4

• 5

Calculate the output of a buck converter if the input is 10 V and the duty cycle is 0.8.

• 8V

• 10V

• 12.5V

• 2V

An SCR is a _______ triggered device.

• Current

• 1. Power

• 1. Voltage

• 1. Resistance

Voltage regulation requires ____.

• only line regulation.

• only load regulation.

• a constant load.

• load and line regulation.

What material is an SCR made of ?

• Silicon

• 1. Carbon

• 1. Germanium

• 1. Gallium Arsenide

Inductor and Capacitor in Buck converter are used to ___________

•  Increase the cost

  
  

•  Decrease the cost

  
  

•  Filter out the harmonics

  
  

• Increase the harmonics

  
  

When the SCR is off , the current in the circuit is

• Zero

• 1. Small leakage current

• 1. Large leakage current

• 1. Thermal current

 A cycloconverter can the change the ____.

• voltage

• current

• power

• frequency

How to turn off an SCR?

• Reduce the gate current

• Set the Anode -Cathode voltage to zero

• Apply negative voltage at the gate

• Set the trigger current to zero

The switching regulators can operate in

• Step up

  
  

• Step down

  
  

• Polarity inverting

  
  

• all mentioned