Q.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
Q.2

The polarity of VBE is such that it reverse biases the base-emitter junction.

  • True
  • False
Q.3

What is the collector current for a C-E configuration with a beta of 100 and a base current of 30 mu.gifA?

  • 30 mu.gifA
  • .3 mu.gifA
  • 3 mA
  • 3 MA
Q.4

BJTs are "junction" transistors because they use current-carrying P-N junctions.

  • True
  • False
Q.5

Current gain in a transistor is inversely proportional to collector current.

  • True
  • False
Q.6

When a transistor is operating as a variable resistor it has transistance.

  • True
  • False
Q.7

A decrease in base current of a C-E amplifier causes the voltage measured between the emitter and the collector to increase.

  • True
  • False
Q.8

In a BJT, the collector current is approximately equal to the base current.

  • True
  • False
Q.9

The input/output relationship of the common-collector and common-base amplifiers is:

  • 270 degrees
  • 180 degrees
  • 90 degrees
  • 0 degrees
Q.10

A transistor may be used as a switching device or as a:

  • fixed resistor
  • tuning device
  • rectifier
  • variable resistor
Q.11

The voltage measured from the collector to the emitter is the sum of the base-emitter voltage plus the collector-base voltage.

  • True
  • False
Q.12

In a common-base (C-B) amplifier, the output is 180 degrees out of phase with the input.

  • True
  • False
Q.13

In a BJT, the collector current is approximately equal to the base current.

  • True
  • False
Q.14

The voltage measured from the collector to the emitter is the sum of the voltage base-emitter plus the voltage collector-base.

  • True
  • False
Q.15

If a transistor operates at the middle of the dc load line, a decrease in the current gain will move the Q point:

  • off the load line
  • nowhere
  • up
  • down
Q.16

Which is beta's current ratio?

  • IC/IB
  • IC/IE
  • IB/IE
  • IE/IB
Q.17

A current ratio of IC/IE is usually less than one and is called:

  • beta
  • theta
  • alpha
  • omega
Q.18

A current ratio of IC/IE is usually less than one and is called:

  • beta
  • theta
  • alpha
  • omega
Q.19

Transistors are controlled to operate as a switch or to operate as a variable resistor.

  • True
  • False
Q.20

The input resistance of the base of an emitter-follower is usually _________.

  • very low
  • very high
  • shorted to ground
  • open
0 h : 0 m : 1 s