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Electronics and Communication Engineering - Electronic Devices and Circuits

Exercise : Electronic Devices and Circuits - Section 2
26.
The Voltage e0 in the figure,
2 V
4 V
4/3 V
8 V
Answer: Option
Explanation:

Req = 4 || 4 + 4 6Ω

I = 2A I = I1 + I2 1 + 1

e0 = 4 x 1 4v.

27.

Assertion (A): is positive real.

Reason (R): For a positive real function Re[H(jω)] ≥ 0 for 0 ≤ ω ≤ ∞.

Both A and R are true and R is correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:

A is not positive real.

28.
A constant k band pass filter has a pass band from 100 to 400 Hz. The resonant frequency of series and shunt arms is
3000 Hz
2500 Hz
2000 Hz
1500 Hz
Answer: Option
Explanation:

Resonant frequency of arms in constant k band pass filter = (fc1)(fc2).

29.
The circuit in figure is switched on at t = 0. At any time t, i(t) =
3 + 3e-1
6 - 3e-1
3 - 3e-t
6 - 6e-1
Answer: Option
Explanation:

30.
Two similar coupled coils are connected in series. The total inductance in series aiding connection is 100 mH. If currents is 3 A, the energy stored in magnetic field is
0.9 J
0.45 J
0.225 J
1.8 J
Answer: Option
Explanation:

Energy = 0.5 LI2.

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