# Two cols having equal resistance but different inductances are connected in series. The time constant of the series combination is the.

1.  sum of the time constants of the individual coils

2.  average of the time constant of individual coils

3.  geometric mean of the time constants of the individual coils

4.  product of the time constants of the individual coils

4

average of the time constant of individual coils

Explanation :
No Explanation available for this question

# An amplifier has an open loop gain of 100, an input impedance of 1 K, and an output impedance of 100 ?A feedback network with a feedback factor of 0.99 is connected in a voltage series feedback mode. The new input and output impedances are

1.  10 and 1 ?

2.  10 ? and 10 K?

3.  100 ? and 1 ?

4.  100 K? 10 K?

4

100 ? and 1 ?

Explanation :
No Explanation available for this question

# In the network shown in the figure, the circuit was initially in the steady-state condition with the switch k closed. At the instant when the switch is opened, the rate of decay of current through the inductance will be.

1.  Zero

2.  0.5 A/S

3.  1 A/S

4.  2 A/S

4

2 A/S

Explanation :
No Explanation available for this question

# The voltage VCB and the current IB for the CB-configuration of the figure shown below will be

1.  3.4 V and 45.8 μ A

2.  6V, and 2.75 m A

3.  34 V and 4.5 m A

4.  None of these

4

3.4 V and 45.8 μ A

Explanation :
No Explanation available for this question

# Consider the following statements regarding the transfer function G(s) plotted in the given figure. 1. G(s) has corner frequencies at  = 0.1, 1 and 10. 2.  3. The magnitude of 20 log10 at  = 1000 is -20 dB. Which of the statements are correct

1.   1, 2 and 3

2.  1 and 2

3.  2 and 3

4.  1 and 3

4

1, 2 and 3

Explanation :
No Explanation available for this question

# The given figure shows root loci of open loop transfer function G(s) H(s) of a system. Consider the following inferences drawn from this figure: 1. It has no zero. 2. It is a stable system. 3. It is a second order system.

1.   1,2 and 3

2.  1 and 2

3.  2 and 3

4.  1 and 3

4

1 and 3

Explanation :
No Explanation available for this question

# For the clamping network shown below, the resulting output for the applied input will be

1.

2.

3.

4.

4 Explanation :
No Explanation available for this question

# In the circuit shown in the figure, the switch S has been opened for long time. It is closed at t= 0. For t > 0, the current flowing through the inductor will be given by.

1.  iL (t) = 1.2 + 0.8 e-2t

2.  iL (t) = 0.8 + 1.2 e-2t

3.  iL (t) = 1.2 – 0.8 e-2t

4.  iL (t) = 0.8 – 1.2 e-2t

4

iL (t) = 1.2 + 0.8 e-2t

Explanation :
No Explanation available for this question

# The mirrored current I of the circuit given below is

1.  10.27 m A

2.  12.53 m A

3.  0.636 m A

4.  10.90 m A

4

10.27 m A

Explanation :
No Explanation available for this question

# The Nyquist plot of a closed- loop system is shown in the given figure, the plot indicates that the

1.   System is unstable

2.   System is stable

3.  System is critically stable

4.  Stability of the system cannot be determined

4