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Analog Electronics

Analog Electronics
The effective channel length of a MOSFET in a saturation decreases with increase in

Source voltage
Body voltage
Gate voltage
Drain voltage

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Analog Electronics
The current gain of a pnp transistor is

 the collector current divided by the emitter current.
 the ratio of collector current to emitter current.
 near zero.
 the negative of the npn current gain.

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Analog Electronics
Depletion region of a p-n junction is formed

 During Heating
 During Reverse bias
 During Forward bias
 During Manufacturing

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Analog Electronics
An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are

fT =1.47 x 1010 Hz & fβ = 1.33 x 1012 Hz
fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz
fT =1.33 x 1012 Hz & fβ = 1.47 x 1010 Hz
fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz

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Analog Electronics
What will be the Potential barrier for Si Diode ?

 0.3 V
 0.07 V
 0.05 V
 0.7 V

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Analog Electronics
The encapsulation of transistor is necessary for

Preventing photo-emission effects
Mechanical ruggedness
Preventing radio interference
Avoiding loss of free electrons

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