Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

In which of the following case the rating of the transformer to deliver 100 watts of d.c. power to a load, will be least?
A:
Half wave rectifier
B:
Full wave rectifier
C:
Bridge type full wave rectifier
D:
Three phase full wave rectifier
Answer: D
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When a p-n junction is forward biased. The width of depletion layer decreases.
A:
True
B:
False
C:
D:
Answer: A
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The fT of a BJT is related to its gm, Cp and Cμ as follows.
A:
B:
C:
D:
Answer: D
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Assertion (A): Hall effect is used to find the type of semiconductor.

Reason (R): When a specimen of semiconductor carrying current I lies in a magnetic field the force on electrons and holes is in opposite directions.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not a correct explanation of A
C:
A is true but R is false
D:
A is false but R is true
Answer: A
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In monostable multivibrator
A:
has no stable state
B:
has one stable state
C:
has two stable states
D:
switches automatically from one state to other state
Answer: B
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