Title: Transistors Quiz
Course: 15/SP Power Electronics Theory (ELTR-2560-31) > Section: Learning Modules

Q: The main two uses for a transistor are as ....
- switch, amplifier
- rectifier, switch
- amplifier, rectifier
- switch, filter
A: switch, amplifier

Q: When a NPN transistor is connected in a circuit, what voltage polarity must be connected to the collector for the circuit to work properly
- positve
- negative
- AC
- it doesn’t matter, Positive or Negative
A: positve

Q: The current flow through the collector-emitter of a transistor is controlled by the ____.
- base to collector junction
- changing temperature of the transistor
- frequency of base current
- amount of base current
A: amount of base current

Q: Transistors are used in place of mechanical switches (relays) because transistors _____.
- operate faster
- last longer
- operate with very small control signals
- all of the above
A: all of the above

Q: What is the gain of an amplifier where 1ma of base current causes 1 amp of collector current.
- 1000
- 100
- 10
- 1
A: 1000

Q: On a bipolar transistor, the main power circuit (where most of the current flows) is between the ___
- base and emitter
- collector and base
- collector and emitter
- ground and base
A: collector and emitter

Q: A transistor is like a faucet (analogy) with the base acting as the _____.
- valve
- source
- load
- drain
A: valve

Q: Assuming a NPN transistor, what will the ohm meter read if the transistor is good (slow down and look at this closely)?
- 0 (continuity)
- OL (open)
- 20 ohms
- 100 ohms
A: OL (open)

Q: An oscilloscope is a ______ meter.
- amp
- ohm
- volt
- frequency
A: volt

Q: A darlington amplifier has ______.
- at least two transistors
- a darling transistor in it
- IGBT and MOSFETs in it
- a darl signal to amplify
A: at least two transistors

Q: Power transistors must be attached to a ______ to use at full power (current).
- bread board
- radio amplifier
- heat sink
- tuner
A: heat sink