Electronics-Bipolar-Junction Transistors (BJT)
Electronics-Bipolar-Junction Transistors (BJT)
1. Three different Q points are shown on a dc load line. The upper Q point represents the:
- minimum current gain
- intermediate current gain
- maximum current gain
- cutoff point
2. A current ratio of IC/IE is usually less than one and is called:
- beta
- theta
- alpha
- omega
3. With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be:
- open
- infinite
- low resistance
- high resistance
4. In a C-E configuration, an emitter resistor is used for:
- stabilization
- ac signal bypass
- collector bias
- higher gain
5. Voltage-divider bias provides:
- an unstable Q point
- a stable Q point
- a Q point that easily varies with changes in the transistor's current gain
- a Q point that is stable and easily varies with changes in the transistor’s current gain
6. To operate properly, a transistor's base-emitter junction must be forward biased with reverse bias applied to which junction?
- collector-emitter
- base-collector
- base-emitter
- collector-base
7. The ends of a load line drawn on a family of curves determine:
- saturation and cutoff
- the operating point
- the power curve
- the amplification factor
8. The C-B configuration is used to provide which type of gain?
- voltage
- current
- resistance
- power
9. A transistor may be used as a switching device or as a:
- fixed resistor
- tuning device
- rectifier
- variable resistor
10. A collector characteristic curve is a graph showing:
- emitter current (IE) versus collector-emitter voltage (VCE) with (VBB) base bias voltage held constant
- collector current (IC) versus collector-emitter voltage (VCE) with (VBB) base bias voltage held constant
- collector current (IC) versus collector-emitter voltage (VC) with (VBB) base bias voltage held constant
- collector current (IC) versus collector-emitter voltage (VCC) with (VBB) base bias voltage held constant