# What is the equivalent impedance seen by the voltage source

1.  28.281350

2.  10-900

3.  6900

4.  6-900

4

28.281350

Explanation :
No Explanation available for this question

# Drift current in a p-n junction is influenced by

1.  Applied voltage

3.  Concentration

4.  All of these

4

Applied voltage

Explanation :
No Explanation available for this question

# In a circuit, voltage & current are given by:The power consumed in the circuit is

1.  100W

2.  50W

3.  25W

4.  12.5W

4

25W

Explanation :
No Explanation available for this question

# Drift plus diffusion current density of electron is expressed as

1.  Jn=qnE+qDndn/dx

2.  Jn=qnE-qDndn/dx

3.  Jn=qnE-AqDndn/dx

4.  None

4

Jn=qnE+qDndn/dx

Explanation :
No Explanation available for this question

# An ideal transformer is i. An abstract concept ii. One where the voltage and current relations are derived from Faraday’s Law and Ampere’s law respectively iii. Is characterized by a single parameter n, the turns ratio. Tick out the correct option

1.  (i)&(ii)

2.  (i)&(iii)

3.  (ii)&(iii)

4.  (i) (ii)&(iii)

4

(i) (ii)&(iii)

Explanation :
No Explanation available for this question

# The ratio of diffusion constant to mobility of carrier

1.  depends on temperature

2.  Depends on type of semiconductor

4.  Universal constant

4

depends on temperature

Explanation :
No Explanation available for this question

# Reciprocity theorem is applicable to a network 1. Which contains R,L & C as elements 2. Initially relaxed system 3. Which has both independent and dependent sources Tick out the correct combination:

1.  1 & 2

2.  1 & 3

3.  2 & 3

4.  1, 2 & 3

4

1 & 2

Explanation :
No Explanation available for this question

# If the current in the 7resistor branch is 0.5A as shown in the figure. Now if the source is connected in series with 7branch and terminals AB are shorted, the current in 5 resistor is

1.  1A

2.  0.5A

3.  9.75A

4.  None of these

4

0.5A

Explanation :
No Explanation available for this question

# Electron mobility for si material is (a) Constant for electrical field intensity (b) Constant at all field values (c) Inversely proportional to between (d) inversely proportional to Ex at pinch off voltage

1.  all of these

2.  b

3.  c and d

4.  a, c and d

4

a, c and d

Explanation :
No Explanation available for this question

1.  a-1;b-3;c-2

2.  a-1;b-2;c-3

3.  a-2;b-1;c-3

4.  a-3;b-1;c-2

4