STUPIDSID
1 (a)
Explain energy band diagram of insulator, semiconductor and conductor.
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1 (b)
Explain Hall Effect.
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2 (a)
Explain
(1) Tunnel Diode (2) Photodiode (3)LED.
(1) Tunnel Diode (2) Photodiode (3)LED.
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2 (b)
Explain V-I characteristic of p-n junction.
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2 (c)
Explain potential variation within graded semiconductor.
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3 (a)
Compare half wave rectifier with full wave rectifier.
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3 (b)
A 230V,50Hz.a.c voltage is applied to the primary of a 5:1 step down transformer
which is used in a bridge rectifier having a load resistor of value 500Ω.Assuming
the diode to be ideal, Determine the following:
(1) d.c output voltage (2) d.c. power delivered to load (3)PIV of each diode (4) output frequency.
(1) d.c output voltage (2) d.c. power delivered to load (3)PIV of each diode (4) output frequency.
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3 (c)
Explain all types of clippers with examples.
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3 (d)
A half wave rectifier is utilized to supply 20V d.c to a resistive load of 400Ω.The
diode used in half wave rectifier has a forward resistance of 40Ω.Determine the
maximum value of the a.c voltage required at the input.
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4 (a)
Write down typical h-parameter values for CE/CB/CC configurations.
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4 (b)
Why bias stabilization is required in transistor? Explain any one method of
transistor biasing.
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4 (c)
Write down typical h-parameter values for CE/CB/CC configurations.
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4 (d)
Explain Miller's theorem.
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5 (a)
Compare JFET with MOSET.
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5 (b)
Compare class A, class B, class C and class AB amplifiers.
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5 (c)
Compare enhancement type MOSFET with depletion type MOSFET
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5 (d)
For N-channel JFET,IDSS =20mA,Vp =-8V, and gmo =5000μs.Find the values of the drain current and trans-conductance at Vgs =-4V.
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