Technical quize

What is the function of a diode?

• To resist current

• To allow current to flow in one direction

• To store energy

• To amplify signals

What is the magnitude of forbidden energy gap of silicon at absolute zero temperature?

• 0.72eV

• 0.78eV

• 1.21eV

• none of these

For a base current of 10 μA, what is the value of collector current in common emitter if β_dc = 100

• 
  10 μA

• 
  100 μA

• 1 mA

• 10 mA

A half wave diode circuit using ideal diode has an input voltage 20 sin ωt volts. Then average and rms values of output voltage are

The Schottky diode is used

• 
  in high-power circuits

• n circuits requiring negative resistance.

• 
  in very fast-switching circuits

• 
  in power supply rectifiers

When transistors are used in digital circuits they usually operate in the:

• 
  active region

• 
  breakdown region

• 
  saturation and cutoff regions

• linear region

With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be:

• 
  open

• 
  infinite

• low resistance

• high resistance

In a C-E configuration, an emitter resistor is used for:

• stabilization

• ac signal bypass

• 
  collector bias

• 
  higher gain

The C-B configuration is used to provide which type of gain?

• voltage

• current

• 
  resistance

• power

In a transistor, collector current is controlled by

• 
  collector voltage

• base current

• 
  collector resistance

• all of the above