Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
A:
normal to both current and magnetic field
B:
in the direction of current
C:
antiparallel to magnetic field
D:
in arbitrary direction
Answer: A
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When diodes are connected in series to increase voltage rating the peak inverse voltage per junction
A:
should not exceed half the breakdown voltage
B:
should not exceed the breakdown voltage
C:
should not exceed one third the breakdown voltage
D:
may be equal to or less than breakdown voltage
Answer: C
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The dynamic resistance of a forward biased p-n diode
A:
varies inversely with current
B:
varies directly with current
C:
is constant
D:
is either constant or varies directly with current
Answer: A
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Intrinsic concentration of charge carriers in a semiconductor varies as
A:
T
B:
T2
C:
T3
D:
T-2
Answer: C
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The kinetic energy of free electrons in a metal is (where k is de-Broglie wave number of the electrons)
A:
∝
B:
∝
C:
μk
D:
μk2
Answer: B
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