Electronics exam level 3 Questions
with Complete Solutions.
Triacs are not typical used in which one of the following circuits
O light dimmers
O small single phase Motor Controllers
O PLC AC switching circuits
O Rectifiers - Answer Plc Ac switching circuits
For a transistor that is not saturated, an increase in base current (Ib) would result in which one
of the following
O decrease in Vce
O None of the other listed answers
O Decrease in Vbe - Answer Decrease in Vce
Which must happen for the correct operation of a NPN Bipolar Junction Transistor ( BJT)
O the base- emitter junction must be reverse biased
O the collector - emitter junction must be reversed biased
O the collector- emitter junction must be forward biased
O the collector - base junction must be forward biased
O the base - emitter junction must be forward biased - Answer The base - emitter junction
must be forward biased
, A SCR is considered a uni-directional thyristor device
O true
O false - Answer True
An electrostatic discharge (ESD) incident with a sensitive component will most often cause what
O A painful but harmful shock
O Latent Damage to the component
O None of the other answers are correct
O the fuse in the antistatic wrist strap to blow - Answer A latent damage to the component
A SCR has a resistance-capacitor trigger circuit. It is modified by adding a second capacitor in
parallel to the first capacitor. What will happen to the SCR's conduction angle
O it will decrease
O it will stay the same
O it will decrease at first and then automatically increase after a few cycles
O it will increase
O it will increase at first and then automatically decrease after a few cycles - Answer It will
decrease
Which logic gate conforms to the statement "output is low only if all inputs are high"
O NOR
O AND
with Complete Solutions.
Triacs are not typical used in which one of the following circuits
O light dimmers
O small single phase Motor Controllers
O PLC AC switching circuits
O Rectifiers - Answer Plc Ac switching circuits
For a transistor that is not saturated, an increase in base current (Ib) would result in which one
of the following
O decrease in Vce
O None of the other listed answers
O Decrease in Vbe - Answer Decrease in Vce
Which must happen for the correct operation of a NPN Bipolar Junction Transistor ( BJT)
O the base- emitter junction must be reverse biased
O the collector - emitter junction must be reversed biased
O the collector- emitter junction must be forward biased
O the collector - base junction must be forward biased
O the base - emitter junction must be forward biased - Answer The base - emitter junction
must be forward biased
, A SCR is considered a uni-directional thyristor device
O true
O false - Answer True
An electrostatic discharge (ESD) incident with a sensitive component will most often cause what
O A painful but harmful shock
O Latent Damage to the component
O None of the other answers are correct
O the fuse in the antistatic wrist strap to blow - Answer A latent damage to the component
A SCR has a resistance-capacitor trigger circuit. It is modified by adding a second capacitor in
parallel to the first capacitor. What will happen to the SCR's conduction angle
O it will decrease
O it will stay the same
O it will decrease at first and then automatically increase after a few cycles
O it will increase
O it will increase at first and then automatically decrease after a few cycles - Answer It will
decrease
Which logic gate conforms to the statement "output is low only if all inputs are high"
O NOR
O AND
