Quiz Chapter 4-Bipolar Junction Transistors

The region on the characteristic curve in which the current changes only slightly with an increase in VCE is called the

• saturation region

• cutoff region

• breakdown region

• active region

Beta DC is defined as the ratio of

• collector current to base current

• collector current to emitter current

• emitter current to base current

• emitter current to collector current

When a BJT is in saturation, the

• collector current does not change with an

  increase in base current

• base current cannot increase

• collector to emitter voltage is maximum

• all of the above

When a BJT is cutoff, the

• voltage from collector to emitter is near zero

• collector current is near zero

• base-emitter junction is forward-biased

• none of the above

The lower end of the dc load line touches the x-axis at

• saturation

• cutoff

• breakdown

• 0.7 V

For the circuit shown, the base current is

• 1.0 uA

• 1.16 uA

• 10 uA

• 11.6 uA

For the circuit shown, the saturation current is

• 200 uA

• 2.0 mA

• 3.79 mA

• 14.8 mA

For the phototransistor circuit, assume there is sufficient light to saturate Q1. In this condition,

• Q2 is also saturated

• the diode is conducting

• the relay is energized

• none of the above

An optocoupler is a single package containing

• two transistors

• an LED and a phototransistor

• a phototransistor and a relay

• an LED and a relay

The transistor package that is a TO-3 case is

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