Electronic Circuits Test-2 (SmallSig.,Power,Diff.&OP-AMP)

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If the transistor in CE amplifier is exchanged for one with higher beta, output voltage (Vout) will

• increase
• decrease
• not change
• either decrease or increase

If the amplitude of input voltage Vin of an amplifier is decreased, output voltage (Vout) will

• Increase
• decrease
• not change

A linear small-signal amplifier

• Uses only a small portion of its load line
• Always has large input signal
• Goes into saturation once on each input cycle
• Is always a common-emitter amplifier

The parameter hfe corresponds to

• βdc
• βac
• αdc
• αac

When emitter bypass capacitor CE in common-emitter (CE) configuration is removed, its ………is considerably reduced

• Input resistance
• output load resistance
• emitter current
• voltage gain

The ac equivalent circuit is derived from the original circuit by shorting all

• Resistors
• Capacitors
• Inductors
• transistors

Emitter resistor(RE) of a CE amplifier has no ac voltage because of the

• DC voltage on it
• Bypass capacitor
• Coupling capacitor
• Load resistor

The voltage across the load resistor of a capacitor-coupled CE amplifier is

• DC and ac
• DC only
• AC only
• Neither dc nor ac