# The threshold voltage of an n-channel MOSFET can be increased by

1.  Increasing channel doping concentration

2.  Reducing channel length

3.  Reducing gate oxide thickness

4.  Decreasing channel doping concentration.

4

Reducing channel length

Explanation :
No Explanation available for this question

# Three different circuits for biasing junction transistor amplifiers are given below The correct decreasing order of preference of these circuits from the point of view bias stabilization is

1.  i, ii, iii

2.  iii, ii, i

3.  ii, iii, i

4.  i, iii, ii.

4

ii, iii, i

Explanation :
No Explanation available for this question

# The MOSFET switch in its on-state may be considered equivalent to

1.  Resistor

2.  Inductor

3.  Capacitor

4.  Battery.

4

Capacitor

Explanation :
No Explanation available for this question

# In the transistor circuit shown in the figure, collector-to-ground voltage is +20 V. which of the following is the probable error

1.  Collector-emitter terminals shorted

2.  Emitter to ground connection open

3.  10 K resistor open

4.  Collector –base terminal shorted.

4

Emitter to ground connection open

Explanation :
No Explanation available for this question

# The center tap full-wave single –phase rectifier circuit uses 2 diodes as shown in the given figure. The rms voltage across each diode is

1.  790.7 V

2.  395.3 V

3.  280 V

4.  201.3 V.

4

395.3 V

Explanation :
No Explanation available for this question

# In the circuit shown in the given figure, transistor is in active mode. VBE=0.7 volt. The approximation without knowing hfe for Vc as shown in the figure is

1.  1.0 V

2.  3.3 V

3.  4.3 V

4.  4.7 V

4

4.3 V

Explanation :
No Explanation available for this question

# A voltage source VAB=4 sin t is applied to the terminals A and B of the circuit shown in the given figure. The diodes are assumed to be identical. The impendence by the circuit across the terminal A and B is

1.  5 K

2.  10 K?

3.  15 K?

4.  20 K?

4

10 K?

Explanation :
No Explanation available for this question

# If α= 0.98, ICO=6 A and Iβ=100 A for transistor, then value of IC will be

1.  2.3 mA

2.  3.1 mA

3.  4.6 mA

4.  5.2 mA.

4

5.2 mA.

Explanation :
No Explanation available for this question

# For the given input, output waveform across the diode shown in the figure will be

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

1.  -40 %

2.  -44.57 %

3.  -46.57 %

4.  -48.0 %.

4