# The output Y in the circuit below is always ‘1’ when

1.   two or more of the inputs P,Q,R are ‘0’

2.  two or more of the inputs P,Q,R are ‘1’

3.  any odd number of the inputs P,Q,R is ‘0’

4.  any odd number of the inputs P,Q,R is ‘1’

4

two or more of the inputs P,Q,R are ‘1’

Explanation :
No Explanation available for this question

# In the circuit shown below, capacitors C1 and C2 are very large and are shorts at the input frequency vi  is a small signal input. The gain magnitude at 10M rad/s

1.   maximum

2.  minimum

3.  unity

4.  zero

4

maximum

Explanation :
No Explanation available for this question

# Drift current in the semiconductors depends upon

1.  only the electric field

2.  only the carrier concentration gradient

3.  both the electric field and the carrier concentration

4.  both the electric field and the carrier concentration gradient

4

both the electric field and the carrier concentration

Explanation :
No Explanation available for this question

# A Zener diode, when used in voltage stabilization circuits, is biased in

1.  reverse bias region below the breakdown voltage

2.  reverse breakdown region

3.  forward bias region

4.  forward bias constant current mode

4

reverse breakdown region

Explanation :
No Explanation available for this question

# The circuit shown below is driven by a sinusoidal input vi=vp cos(t/RC) the steady state output v0 is

1.  (V p/ 3) cos t /RC

2.   (V p/3) sin t/RC

3.  (V p/2) cos t /RC

4.  (V p/ 2) sin t/RC

4

(V p/3) sin t/RC

Explanation :
No Explanation available for this question

# Consider a closed surface S surrounding volume V. If  is the position vector of a point inside S, with  the unit normal on S, the value of the integral is

1.  3V

2.  5V

3.  10V

4.  15V

4

15V

Explanation :
No Explanation available for this question

# The modes in a rectangular waveguide are denoted by TEmn/TMmnwhere m and n are the eigen numbers along the larger and smaller dimensions of the waveguide respectively. Which one of the following statements is TRUE

1.  The TM10 mode of the wave does not exist

2.  The TE10 mode of the wave does not exist

3.  The TM10 and the TE10 modes both exist and have the same cut-off frequencies

4.  The TM10 and TM01 modes both exist and have the same cut-off frequencies

4

The TM10 mode of the wave does not exist

Explanation :
No Explanation available for this question

# The solution of the differential equation  dy/dx=ky,y(0)=c is

1.  x = ceky

2.  x = kecy

3.  y = cekx

4.  y =ce–kx

4

y = cekx

Explanation :
No Explanation available for this question

# The Column-I lists the attributes and the Column-II lists the modulation systems. Match the attribute to the modulation system that best meets it        Column-I              Column-II        P Power efficient transmission of signals 1 Conventional AM Q Most bandwidth efficient transmission of voice signals 2 FM R Simplestreceiver structure 3 VSB S Bandwidth efficient transmission of signals with Significant dc component 4 SSB-SC

1.  P-4;Q-2;R-1;S-3

2.  P-2;Q-4;R-1;S-3

3.  P-3;Q-2;R-1;S-4

4.  P-2;Q-4;R-3;S-1

4

P-2;Q-4;R-1;S-3

Explanation :
No Explanation available for this question

1.  0.288

2.  0.334

3.  0.667

4.  0.720

4