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Analog Electronics

Analog Electronics
A semiconductor material is formed by

 Electrovalent bonds
None of these
 Metallic bonds
 Covalent bonds

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Analog Electronics
Electron mobility is defined as

 Diffusion velocity per unit field
None of these
 Drift velocity per unit field
 the movement of electrons

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Analog Electronics
The current gain of a BJT is

gm rπ
gm /rπ
gm / r0
gm r0

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Analog Electronics
A 741-type OP-amp has a gain-bandwidth product of 1MHz.A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of

1000/7.07 KHz
50 KHz
100 KHz
1000/17 KHz

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Analog Electronics
The output voltage of an emitter follower is across the

  load resistor.
 emitter diode.
 DC collector resistor.
 emitter diode and external AC emitter resistance.

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Analog Electronics
If the emitter resistance increases, the collector voltage

 stays the same.
 breaks down the transistor.
 decreases.
  increases.

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