46. In an FET as V_GS is changed from zero to increasing reverse bias, the value of g_m
    

1. 1. increased

   
   
   

   2. decreased

   
   
   

   3. remains constant

   
   
   

   4. falls suddenly to zero

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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47. For the clamping network shown below, resulting output for the applied input will be
    
    

1. 1. 
      

   
   
   

   2. 
      

   
   
   

   3. 
      

   
   
   

   4. 

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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48. The transistor in the circuit shown is operating in
    
    

1. 1. cut-off region

   
   
   

   2. active region

   
   
   

   3. saturation region

   
   
   

   4. either in the active or saturation region

   
   
   

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1. View Hint View Answer Discuss in Forum

   From the figure,
   

   IB =	5 - VBE	=	4.2	= 4.2 mA
   	100 K		100 K

   
   

   Ic =	4.8	mA
   	5

   
   

   Since (IB)min =	Ic	≤ IB ,
   	hFE

   
   hence the transistor will operate in saturation region.

   Correct Option: C

   From the figure,
   

   IB =	5 - VBE	=	4.2	= 4.2 mA
   	100 K		100 K

   
   

   Ic =	4.8	mA
   	5

   
   

   Since (IB)min =	Ic	≤ IB ,
   	hFE

   
   hence the transistor will operate in saturation region.

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49. Three different circuits for biasing junction transistor amplifiers are given below
    
    The correct decreasing order of preference of these circuits fr om the point of view of bias stabilisation is
    

1. 1. I, II, III

   
   
   

   2. III, II, I

   
   
   

   3. II, III, I

   
   
   

   4. I, III, II

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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50. The MOSFET swit ch in it s on-st at e may be considered equivalent to
    

1. 1. resistor

   
   
   

   2. inductor

   
   
   

   3. capacitor

   
   
   

   4. battery

   
   
   

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1. View Hint View Answer Discuss in Forum

   MOSFET switch in ON state is equivalent to a capacitor.

   Correct Option: C

   MOSFET switch in ON state is equivalent to a capacitor.

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