Section 1 - Network Theory

Question 1

Kirchhoff's Current Law (KCL) is a consequence of the principle of:

A. Conservation of energy

B. Conservation of charge

C. Conservation of momentum

D. Conservation of flux

Question 2

Kirchhoff's Voltage Law (KVL) is a consequence of the principle of:

A. Conservation of charge

B. Conservation of energy

C. Conservation of mass

D. Ohm's law

Question 3

For mesh analysis to be applied directly, the network must be:

A. A non-planar network

B. A planar network

C. A network with only voltage sources

D. A network with only resistors

Question 4

In a network with N nodes, the number of independent node equations required is:

A. N

B. N - 1

C. N + 1

D. N / 2

Question 5

Thevenin's theorem states that any linear two-terminal network can be replaced by:

A. A single current source in parallel with a resistance

B. A single voltage source in series with a resistance

C. A single voltage source alone

D. A single resistance alone

Question 6

Norton's theorem is the dual of:

A. Superposition theorem

B. Thevenin's theorem

C. Reciprocity theorem

D. Millman's theorem

Question 7

The maximum power transfer theorem for a DC source states that maximum power is delivered to the load when the load resistance:

A. Is zero

B. Is infinite

C. Equals the source (Thevenin) resistance

D. Is twice the source resistance

Question 8

Under the maximum power transfer condition, the efficiency of power transfer is:

A. 100 percent

B. 75 percent

C. 50 percent

D. 25 percent

Question 9

The superposition theorem is applicable only to networks that are:

A. Linear and bilateral

B. Non-linear

C. Time-varying only

D. Purely resistive

Question 10

The reciprocity theorem is applicable to networks that are:

A. Linear and time-invariant with a single independent source

B. Non-linear with multiple sources

C. Time-varying networks

D. Networks with dependent sources

Question 11

The time constant of a series RL circuit is:

A. RL

B. L/R

C. R/L

D. 1/(RL)

Question 12

The time constant of a series RC circuit is:

A. R/C

B. C/R

C. RC

D. 1/(RC)

Question 13

The current through an inductor:

A. Can change instantaneously

B. Cannot change instantaneously

C. Is always zero at t = 0

D. Is always equal to the source current

Question 14

The voltage across a capacitor:

A. Can change instantaneously

B. Cannot change instantaneously

C. Is always zero

D. Is always equal to the source voltage

Question 15

At resonance in a series RLC circuit:

A. Impedance is maximum and current is minimum

B. Impedance is minimum and current is maximum

C. Voltage across the resistor is zero

D. The circuit behaves as pure capacitor

Question 16

The resonant frequency of a series RLC circuit is given by:

A. 1 / (2 pi sqrt(LC))

B. 1 / (2 pi LC)

C. sqrt(LC) / (2 pi)

D. 2 pi sqrt(LC)

Question 17

The quality factor Q of a series RLC resonant circuit is:

A. R / (omega L)

B. (omega L) / R

C. R * omega * C

D. R * L * C

Question 18

A high-Q resonant circuit has:

A. A wide bandwidth and poor selectivity

B. A narrow bandwidth and high selectivity

C. Zero bandwidth

D. Infinite bandwidth

Question 19

For a two-port network described by Z-parameters, the parameter Z12 represents:

A. Input impedance with output open-circuited

B. Output impedance with input open-circuited

C. Forward transfer impedance with input open-circuited

D. Reverse transfer impedance with input open-circuited

Question 20

A two-port network is said to be reciprocal if:

A. Z11 = Z22

B. Z12 = Z21

C. Z11 + Z22 = 0

D. Z11 * Z22 = Z12 * Z21

Question 21

For a two-port network in ABCD (transmission) parameters, the network is reciprocal if:

A. A = D

B. AD - BC = 1

C. A + D = 0

D. B = C

Question 22

The Laplace transform of a unit step function u(t) is:

A. 1

B. 1/s

C. s

D. 1/s^2

Question 23

The Laplace transform of a unit impulse delta(t) is:

A. 0

B. 1

C. 1/s

D. s

Question 24

Poles of a stable network transfer function must lie:

A. On the right half of the s-plane

B. On the left half of the s-plane

C. On the imaginary axis only

D. At the origin only

Question 25

For a network to be minimum phase, all its poles and zeros must lie:

A. In the right half of the s-plane

B. In the left half of the s-plane (or on the jw-axis for poles/zeros of transmission)

C. On the real axis only

D. Anywhere in the s-plane

Questions

Section 1 - Network Theory - Set 1