Network Theory And Analysis MCQ Questions & Answers

41

The transient current in an RLC circuit is oscillating when

A) $$R = 2\sqrt {\frac{L}{C}} $$ B) $$R > 2\sqrt {\frac{L}{C}} $$ C) $$R < 2\sqrt {\frac{L}{C}} $$ D) $$R = 0$$

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Answer & Solution

Answer: Option C

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42

A series RC circuit has R = 5 Ω and C = 10 µF. The current in the circuit is 5sin20000t. The applied voltage is

A) $$25\sqrt 2 \sin \left( {20000t + {{45}^ \circ }} \right)$$ B) $$25\sqrt 2 \sin \left( {20000t - {{45}^ \circ }} \right)$$ C) $$25\sqrt 2 \sin 20000t$$ D) $$25\sqrt 2 \sin \left( {20000t - {{90}^ \circ }} \right)$$

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Answer & Solution

Answer: Option B

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43

An RC circuit has an R of 10 kΩ and C = 0.05 µF. The applied voltage for charging is 36 V. How long will it take C to charge to 24 V?

A) 6.2 msec B) 4.5 msec C) 0.549 msec D) 0.26 msec

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Answer & Solution

Answer: Option D

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44

Which one of the following statements is not a property of R-L driving point impedance?

A) The first critical frequency at the origin is a zero B) The last critical frequency is a pole C) The impedance at s = ∞ is always less than the impedance at s = zero D) The slope of the impedance curve is positive at all points

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Answer & Solution

Answer: Option C

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45

In the circuit shown below, shown S is closed at t = 0. The time constant of the circuit and initial value of current i(t) are
Network Theory and Analysis mcq question image

Network Theory and Analysis mcq question image

A) 30 sec, 0.5 A B) 60 sec, 1.0 A C) 90 sec, 1.0 A D) 20 sec, 0.5 A

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Answer: Option D

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46

A battery charger can drive a current of 5 A into a 1 ohm resistance connected at its output terminals. If it is able to charge an ideal 2 V battery at 7 A rate, then its Thevenin's equivalent will be

A) 7.5 V in series with 0.5 ohm B) 12.5 V in series with 1.5 ohm C) 7.5 V in parallel with 0.5 ohm D) 1.25 V in parallel with 1.5 ohm

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Answer & Solution

Answer: Option B

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47

Energy needed to move 4 coulombs of charge is 4 joules. The potential difference is

A) 2 Volt B) 1 Volt C) 0.1 Volt D) 0.2 Volt

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Answer & Solution

Answer: Option B

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48

The Z-parameter matrix \[\left[ {\begin{array}{*{20}{c}} {{{\text{Z}}_{11}}}&{{{\text{Z}}_{12}}} \\ {{{\text{Z}}_{21}}}&{{{\text{Z}}_{22}}} \end{array}} \right]\] for the two-port network shown is
Network Theory and Analysis mcq question image

A) \[\left[ {\begin{array}{*{20}{c}} 2&{ - 2} \\ { - 2}&2 \end{array}} \right]\] B) \[\left[ {\begin{array}{*{20}{c}} 2&2 \\ 2&2 \end{array}} \right]\] C) \[\left[ {\begin{array}{*{20}{c}} 9&{ - 3} \\ 6&9 \end{array}} \right]\] D) \[\left[ {\begin{array}{*{20}{c}} 9&3 \\ 6&9 \end{array}} \right]\]

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Answer & Solution

Answer: Option A

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49

Choose the incorrect answer related to mutual inductance

A) Mutual inductance is measured in Henry B) Mutual inductance may appear either as positive or negative quantity C) The current in a coil generates magnetic flux in the same coil and nearby coil, inducing a voltage in second coil D) M₁₂ = M₂₁

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Answer & Solution

Answer: Option B

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50

Which statement is not correct? The given circuit is
Network Theory and Analysis mcq question image

A) Low pass filter B) High pass filter C) De-emphasis circuit D) Integrator

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Answer & Solution

Answer: Option B

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Network Theory And Analysis MCQ Questions & Answers | ECE