# The differential equation 100d2y/dt2-20dy/dt+y=x(t) describes a system with an input x(t) and an output y(t). The system. Which is initially relaxed, is excited by a unit step input. The output y(t) can be represented by the waveform

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The transfer function of a zero-order hold is

1.   1-exp(-Ts)/s

2.  1/s

3.  1

4.  1/[1-exp(-Ts)

4

1-exp(-Ts)/s

Explanation :
No Explanation available for this question

# For the Schmitt trigger oscillator shown in the given figure saturation output voltage are + 10 V and -5V   The frequency of oscillation is

1.  2183 Hz

2.  869 Hz

3.  1369 Hz

4.  1443 Hz

4

869 Hz

Explanation :
No Explanation available for this question

# The circuit of given figure shows as 555 Timer IC connected as an astable mutivibrator. The value of the capacitor C is 10 nF. The value of the resistors RA and RB for a frequency of 10 kHZ and a duty cycle of 0.75 for the input voltage waveformm are

1.  RA = 3.62 KΩ, RB = 3.62 KΩ

2.  RA = 3.62 KΩ, RB = 7.25 KΩ

3.  RA =7.25 KΩ, RB = 3.62 KΩ

4.  RA =7.25 KΩ, RB =7.25 KΩ

4

RA =7.25 KΩ, RB = 3.62 KΩ

Explanation :
No Explanation available for this question

# The response of an initially relaxed linear constant parameter network to a unit impulse applied at t=0 is 4e-2tU9t). The response of this network to a unit step function will be

1.   2{1-e-2t]u(t)

2.   4[e-t-e-2t]u(t)

3.  sin 2t

4.  (1-4e-4t)u(t)

4

2{1-e-2t]u(t)

Explanation :
No Explanation available for this question

# A 3-bit weighted resistor DAC shown in the figure has VR = 2V and R1/r =2. For an input of 100, the output will be

1.  -2V

2.  -4V

3.  2V

4.  4V

4

-4V

Explanation :
No Explanation available for this question

# Current I through resistance r in the circuit shown below, is

1.  – V/12R

2.  V/12R

3.  V/6R

4.  V/3R

4

V/12R

Explanation :
No Explanation available for this question

# The impulse response and the excitation function of a linear time invariant causal system are shown in Fig. a and b respectively. The output of the system at t=2 sec. is equal to

1.   0

2.   ½

3.  3/2

4.  1

4

½

Explanation :
No Explanation available for this question

# The decoding circuit has been used to generate the active low chip. Then signal for a microprocessor peripheral (address) line are designated as A0 to A7 for I/O address)

1.  60 H to 63 H

2.  A 4 to A 7 H

3.  70 H to 73 H

4.  70 H to 73 H

4

60 H to 63 H

Explanation :
No Explanation available for this question

# An excitation is applied to a system at t=T and its response is zero for -∞

1.  Non-causal system

2.  Stable system

3.  Causal system

4.  Unstable system

4