# mobility of an electron in a conductor is expressed in terms of

1.  Cm2/V-s

2.  Cm/V-s

3.  Cm2/V

4.   Cm2/s

4
Correct Answer :

Cm2/V-s

Explanation :
No Explanation available for this question

# If probabilities that A and B will die within a year are P and q respectively,then probability that only one of them will be alive at the end of the year is

1.  Pq

2.  p(1-q)

3.  q(1-p)

4.  p+q-2pq

4
Correct Answer :

p+q-2pq

Explanation :
No Explanation available for this question

# In a binomial distribution,mean is 4 and variance is 3.Then,its mode is

1.  5

2.  6

3.  4

4.  None of these

4
Correct Answer :

4

Explanation :
No Explanation available for this question

# If sum and distribution of the mean and variance of a binomial distribution are 24 and 18 respectively,then distribution is

1.

2.

3.

4.

4
Correct Answer :

Explanation :
No Explanation available for this question

# Then correlation coefficient r= ±1,then two regression lines

1.  Are perpendicular to each other

2.  Coincide

3.  Are parallel to each other

4.  D not exist

4
Correct Answer :

Coincide

Explanation :
No Explanation available for this question

# As the temperature is increased, the voltage across a diode carrying a constant current

1.  Increases

2.  Decreases

3.  Remains constant

4.   May increase or decrease depending upon the doping levels in the junction

4
Correct Answer :

Increases

Explanation :
No Explanation available for this question

# If r=0,then

1.  There is a perfect correlation between x and y

2.  x and y are not correlated

3.  there is a positive correlation between x and y

4.  there is a negative correlation between a and y

4
Correct Answer :

x and y are not correlated

Explanation :
No Explanation available for this question

# The variation of dd drain current with gate-to-source voltage(ID-VGS characteristic) of a MOSFET is shown in the given figure.The MOSFET is a/an

1.  n-channel deletion mode device

2.  n-channel enhancement mode device

3.  p-channel depletion mode device

4.   p-channel enhancement  mode device

4
Correct Answer :

p-channel enhancement  mode device

Explanation :
No Explanation available for this question

# For the n-chnnel enhancement MOSFET shown in the given figure, threshold voltage Vtn=2V. The drain current ID of  the MOSFET is 4 mA when drain resistance RD is 1KΩ. If the value of RD  is increased to 4 KΩ, then drain current ID will become

1.  2.8mA

2.  2.0mA

3.  1.4mA

4.   1.0mA

4
Correct Answer :

2.8mA

Explanation :
No Explanation available for this question

# A CE amplifier has a resistor RF connected between collector and base RF=40 k. Rc=4k. If hfe=50, rπ=1k, then output resistance R0 is

1.  40kΩ

2.  20kΩ

3.  4kΩ

4.  0.66kΩ

4
Correct Answer :

0.66kΩ

Explanation :
No Explanation available for this question

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