ATL qualifying test

What is the value of Stability factor for an ideal transistor?    

• 1000

• 100

• infinite

• 0

The biasing circuit that gives best stability to Q point is        

• base resistance biasing

• feedback resistor biasing             

• potential divider biasing

• emitter resistor biasing

The Q point in a voltage amplifier is selected in the middle of the active region because

• it gives better stability

• the circuit needs a small   

• the biasing circuit then need less number of resistors

• it gives distortions less output

 Which of the following has a negative temperature coefficient of resistance?

• Sensitor

• thermistor

• capacitor

• diode

Negative feedback is employed in________  

• Oscillators       

• Rectifiers

• Amplifiers

• UJT relaxation oscillator  

Barkhausen Criterion states that                                                   

• |Aβ|=1,Φ=360deg 

•  |Aβ|=2,Φ=360deg   

• |Aβ|=0,Φ=360deg 

• |Aβ|=1,Φ=180deg 

Quartz crystal oscillators are popularly used because

• High Q and high frequency stability   

• Low Q and high frequency stability    

• High Q and low frequency stability    

• None of these

Large signal amplifiers are also known as______       

• Voltage Amplifiers     

• Current Amplifiers

• Power Amplifiers

• None of these

Crossover distortion is present in        

• Class-A

• Class-B

• Class-AB

• none

Speed up capacitors are also called as______

• Variable capacitors

• Fixed capacitors

• transpose capacitors

•  transfer capacitors