# In the network shown in the given figure i=0 hen E=4V, I=2A and i=1A when E=8V, I=2A. Then Thevenin voltage and resistance looking in the terminals AB are

1.  4V, 2

2.  4V, 4

3.  8V, 2

4.  8V, 4

4

4V, 4

Explanation :
No Explanation available for this question

# If temperature of an impure semiconductor is increased then

1.  It will becomes more impure

2.  The impurity remains at the same level

3.  The semiconductor becomes intrinsic

4.  None of these

4

The semiconductor becomes intrinsic

Explanation :
No Explanation available for this question

# At room temperature the relation between the diffusion & mobility of a p type semiconductor is

1.  Dpαp& Dpαp

2.  Dpα1/p

3.  Dp=0.26p

4.  None of these

4

Dpαp& Dpαp

Explanation :
No Explanation available for this question

# The two port network shown in figure is characterized by z11, z12, z21, z22. For the equivalent Thevenin’s source looking to left of port-2, the Thevenin’s voltage is

1.  (z11/z11 +zg) x Vg

2.  (z12/z12 +zg) x Vg

3.  (z21/z11 +zg) x Vg

4.  (z12/z11 +zg) x Vg

4

(z12/z11 +zg) x Vg

Explanation :
No Explanation available for this question

# The bandgap of GaASP is 1.98eV. The colour of radiation during recombination will be

1.  Red

2.  Orange

3.  Violet

4.  Blue

4

Red

Explanation :
No Explanation available for this question

# The two port network shown in figure is characterized by z11, z12, z21, z22. The Thevenin’s impedance is

1.  Z22 - Z12

2.  Z22 - Z11

3.

4.

4

Explanation :
No Explanation available for this question

# Zener diode for the following circuit is

1.  2.67mA

2.  4.54mA

3.  omA

4.  None of these

4

omA

Explanation :
No Explanation available for this question

# Zener diode d.c resistance

1.  Always remains sam

2.  does not remain constant

3.  Has a very high value

4.  Both (A) and (c)

4

does not remain constant

Explanation :
No Explanation available for this question

# A balanced 3-phase star connected load is fed from a 208 volt 3-phase supply. Each leg has a load of 15+j20. Then line current is

1.  5A

2.  4.8A

3.  4.5A

4.  None of these

4

4.8A

Explanation :
No Explanation available for this question

# A tunnel diode has

1.  A very thick barrier width (800A0)

2.  A moderate barrier width (500A0)

3.  A very narrow barrier width (100A0)

4.  None of these

4