# Assuming that the β of the transistor is extremely large and VBE = 0.7V, IC and VCE in the circuit shown in the figure are

1.  IC = 1 mA, VCE = 4.7 V

2.  IC = 0.5 mA, VCE = 3.75 V

3.  IC = 1 mA, VCE = 2.5 V

4.  IC = 0.5 mA, VCE = 3.9 V

4

IC = 1 mA, VCE = 2.5 V

Explanation :
No Explanation available for this question

# The value of C required for sinusoidal oscillations of frequency 1kHz in the circuit of given figure is

1.  (1/2π) μF

2.  2π μF

3.  (1/(2π√6)) μF

4.  2π√6 μF

4

(1/2π) μF

Explanation :
No Explanation available for this question

# In the op-amp circuit given in the figure, the load current IL is

1.   -(vs/R2)

2.  (vs/R2)

3.  -(vs/RL)

4.  -(v /RL )

4

-(vs/R2)

Explanation :
No Explanation available for this question

# In the voltage regulator shown in the figure, the load current can vary from 100 mA to 500mA. Assuming that the Zener diode is ideal (i.e., the Zener knee current is negligibly small and Zener resistance is zero in the breakdown region), the value of R is

1.  7

2.  70 ?

3.  (70/3) ?

4.  14 ?

4

14 ?

Explanation :
No Explanation available for this question

# In  the modulo-6 ripple counter shown  in  the given  figure,  the output of  the 2-input gate  is used to clear the J-K flip-flops. The 2-input gate is

1.  a NAND gate

2.  a NOR gate

3.  an OR gate

4.  an AND gate

4

an OR gate

Explanation :
No Explanation available for this question

# A rectangular pulse train s(t) as shown in the figure is convolved with the signal cos2 (4p x103t). the convolved signal will be a

1.  DC

2.  12 kHz sinusoid

3.  8 kHz sinusoid

4.  14 kHz sinusoid

4

14 kHz sinusoid

Explanation :
No Explanation available for this question

# The impulse response h[n] of a linear time invariant system is given as If the input to the above system is the sequence e(jπn/4), then the output is

1.  4√2e(jπn/4)

2.  4√2e(-jπn/4)

3.  4e(jπn/4)

4.  -4e(jπn/4)

4

4√2e(jπn/4)

Explanation :
No Explanation available for this question

# Let x(t) and y(t) (with Fourier transforms X(f) and Y(f) respectively) be related as shown inthe given figure. Then Y(f) is

1.  -(1/2) X (f/2)e-j2πf

2.  -(1/2) X (f/2)ej2πf

3.  - X (f/2)ej2πf

4.  - X (f/2)e-j2πf

4

-(1/2) X (f/2)ej2πf

Explanation :
No Explanation available for this question

# Consider the signal flow graph shown in the figure below. The gain (X5/X1) is

1.  (1 - (be + cf + dg))/abc

2.  bedg/(1 - (be + cf + dg))

3.  abcd/(1 - (be + cf + dg) + bedg)

4.  (1 - (be + cf + dg) + bedg)/abcd

4

abcd/(1 - (be + cf + dg) + bedg)

Explanation :
No Explanation available for this question

1.  (1/2) sec-1

2.  -1 sec-1

3.  -(1/2) sec-1

4.  1 sec-1

4