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Q1. | In a loss line R_{L} < Z_{0}, then |

A. | Reflection coefficient is zero [Wrong Answer] |

B. | Reflection coefficient is ∞ [Wrong Answer] |

C. | Reflection coefficient is negative [Correct Answer] |

D. | Reflection coefficient is positive [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ In an home T.V. receiver, the leed in from the antenna is

coaxial cable of 75 Ω

ordinary twisted wire

bar copper wire

twin wire

⇒ The addition of a pole to the open loop transfer function pulls the root locus

to the right

to the left and making the system more stable

towards right or left depending on the position of new pole

none of the above

⇒ For an ideal transformer

only Y parameter exist

only Z parameter

Z, Y both exist

neither Z parameter nor Y parameter exist

⇒

**Assertion (A):** In *p* type semiconductor conduction is mainly due to holes.

**Reason (R):** In *p* type material the holes are majority carriers.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not a correct explanation of A

A is true but R is false

A is false but R is true

⇒ For a bit rate of 8 kbps, the best possible values of the transmitted frequencies in a coherent binary FSK system are

16 kHz and 20 kHz

20 kHz and 32 kHz

20 kHz and 40 kHz

32 kHz and 40 kHz

⇒ Determine the transistor capacitance of a diffused junction varicap diode of a reverse potential of 4.2 V if C(0) = 80 pf and V

_{T}= 0.7 V

42 pf

153.03 pf

13.33 pf

Data inadequate

⇒ When determining Thevenin's resistance of a circuit

all sources must be open circuited

all sources must be short circuited

all voltages sources must be open circuited and all current sources must be short circuited

all sources must be replaced by their internal resistances

⇒ The frequency range of 300 kHz to 3000 kHz is known as

low frequency

medium frequency

high frequency

very high frequency

⇒ The impulse response

*h*(

*t*) of a linear time-invariant continuous time system is described by

*h*(

*t*) = exp (a

*t*)

*u*(

*t*) + exp (β

*t*)

*u*(-

*t*), where

*u*(

*t*) denotes the unit step function, and a and β are constants. This system is stable if

a is positive and β is positive

a is negative and β is negative

a is positive and β is negative

a is negative and β is positive

⇒ In a step down chopper using pulse width modulation, T

_{on}= 3 x 10

^{-3}and T

_{off}= 1 x 10

^{-3}s. The chopping frequency is

333.33

250

500

1000

⇒

Match the following:

List I (Properties) | List II (Relations) | ||
---|---|---|---|

A. | Linear but NOT time-invariant | 1. | y(t) = t^{2}x(t) |

B. | Time-invariant but NOT linear | 2. | y(t) = t |x(t)| |

C. | Linear and time invariant | 3. | y(t) = |x(t)| |

4. | y(t) = x(t - 5) |

A-1, B-3, C-4

A-2, B-3, C-4

A-3, B-1, C-2

A-1, B-2, C-3

⇒ In an RLC series circuit having finite values of RLC, the phase difference between applied voltage and current is

always 0°

between 0 and 180°

between 0 and 90°

always 90°

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | Ratio of maximum energy stored to energy dissipated per cycle | 1. | Propagation constant |

B. | TEM mode is loss less medium | 2. | Cutoff frequency is zero |

C. | Ratio of frequency in radian to phase velocity of EM wave | 3. | Quality factor of cavity |

D. | TEM is the mode of lowest cutoff frequency | 4. | Cylindrical waveguide |

A-3, B-2, C-4, D-1

A-2, B-3, C-1, D-4

A-3, B-2, C-1, D-4

A-2, B-3, C-4, D-1

⇒ An oscilloscope has an input impedance consisting of 1 MΩ and 20 pF is parallel. A high impedance probe connected to input of this oscilloscope has a 10 MΩ series resistance. This 10 MΩ series resistance

may not be shunted

should be shunted by 2 pF capacitor

should be shunted by 20 pF capacitor

should be shunted by 200 pF capacitor

⇒ Which of the following flip-flop do not have race problem?

T flip-flop

D flip-flop

JK flip-flop

Master-slave flip-flop

⇒ A transponder is a satellite equipment which

receives a signal from Earth station and amplifies

changes the frequency of the received signal

retransmits the received signal

does all of the above-mentioned functions

⇒ Form factor for a sine wave is

1.414

0.707

1.11

0.637

⇒ The radar cross-section of a target depends an

frequency

polarization of incident wave

aspect of target

all of the above

⇒ In the network shown in figure, the voltage drops across R

_{2}and R

_{3}are 10 V and 16 V with polarities as shown. The current in R

_{1is 9 A and directed towards node 0is 9 A and directed away from node 0is 9 A but directed of current cannot be foundis impossible to be found}

⇒ The polynomial P (

*s*) = (

*s*- 1) (

*s*

^{2}+ 1) (

*s*+ 2) (

*s*+ 3) is

Hurwitz but not strictly Hurwitz

not Hurwitz

strictly Hurwitz

anti/Hurwitz

⇒ Common base configuration is little used because

it has low input impedance

it has high input impedance

it does not heat up

it has very high gain

⇒ Among the filter, Bessel, Butterworth and chebyshev, the filter with maximally flat response is

all

butterworth

bessel

butterworth, Chebyshev

⇒ In the given figure, the flip flop

negative edge triggered

positive edge triggered

level triggered

either (a) or (c)

⇒ When cells are connected in series, emfs of all cells must be equal.

TRUE

FALSE

⇒ In a series RLC circuit, the current at resonance is I

_{0}the total energy stored in the circuit at resonance is

LI

_{0}

^{2}

2 LI

_{0}

^{2}

2 LI

_{0}

^{2}

0.5 LI

^{2}

⇒ If V = 100 ∠ 16°, the (V) is

10 ∠ 32°

10 ∠ 8°

10 ∠ 16°

10 ∠ 4°

⇒ In a self bias circuit for CE amplifier, the emitter resistance is made three times the original value. The collector current will

remain the same

become three times

decrease

become one-third

⇒ The phase velocity

*v*in a transmission line is

LC

C/L

L/C

1/LC

⇒ If the target area is small compared to wavelength of radar the situation is called

resonance region

Rayleigh region

optical region

binomial region

⇒ A periodic rectangular signal,

*x*(

*t*) has the waveform shown in the given figure. Frequency of the fifth harmonic of its spectrum is _______

200 Hz

250 Hz

400 Hz

1250 Hz