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Q1. | For TE or TM modes of propagation in bounded media, the phase velocity is |

A. | independent of frequency [Wrong Answer] |

B. | is a linear function of frequency [Wrong Answer] |

C. | is a non-linear function of frequency [Correct Answer] |

D. | can be frequency dependent or frequency independent on the source [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 :**

⇒ Consider the following circuits. Assume all gates to have finite propagation d

(1) only

(1) and (2) only

(2) (3) and (4) only

All (1) (2) (3) and (4)

⇒ A ramp input applied to a unity feedback system results in 5% steady state error. The type number and zero frequency gain of the system are respectively.

1 and 20

0 and 20

0 and 1/20

1 and 1/20

⇒ The magnetization 'm' of a superconductor in a field of H is

extremely small

- H

-1

Zero

⇒ At a very low temperature, a semiconductor

becomes a conductor

becomes an insulator

may become a conductor or an insulator

will remain a semiconductor becomes a conductor or an insulator

⇒ For the BJT shown in figure, β = 50, the value of V

_{CE}

3.13 V

4.24 V

5.18 V

none

⇒ For the logic circuit shown in figure, the simplified Boolean expression for the output

A + B + C

AB

B

C

⇒ Among the various modulation systems, the most favoured from the point of linearity of modulation and efficiency is

anode or collector modulation

central grid modulation

screen grid modulation

modulated oscillators

⇒ A 200 turn coil has a self inductance of 10 mH. If the number of turns is doubled, all other quantities remaining the same, the self inductance will be

2.5 mH

5 mH

20 mH

40 mH

⇒ A binary with a digits, all of which are unity has the value

*n*

^{2}- 1

2

^{n}2(

^{n - 1})

2

^{n}- 1

⇒ The time needed by a TTL circuit to switch from 0 to 1 or 1 to 0 is about

10 μs

10 ns

100 μs

50 ns

⇒ An RLC series circuit has Q = 100 and ω

_{0}= 20 rad/sec. The bandwidth is

0.2 rad/sec

2 rad/sec

20 rad/sec

2000 rad/sec

⇒

Match the following:

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

A. | PMMC | 1. | Square law type scale |

B. | Moving iron | 2. | Very good response |

C. | Thermo-couple | 3. | Linear scale |

D. | Electrostatic | 4. | Voltmeter |

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

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

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

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

⇒ For F

_{2}layer the critical frequency is about

500 MHz

100 MHz

25 MHz

10 MHz

⇒ Which of the following is a valid variable in FORTRAN 77?

0.125

ALPHA -3

ALPHA 3

BALPHAC

⇒ If the value of C

_{2}and C

_{3}are doubled, the oscillation frequency will be

quadrupled

doubled

unchanged

halved

⇒ The term efficacy, is defined by

same as efficiency

measure of the ability of a device to produce a desired effect

input/output

(efficiency)

^{2}

⇒ Which of the following microphones works on the principle of Faraday's law?

Carbon

Condenser

Moving coil

Electret

⇒ A 10 μF capacitor is charged from a 5 volt source through a resistance of 10 kΩ. The charging current offer 35 m sec. If the initial voltage on C is - 3 V is

0.56 mA

5.6 mA

6 mA

5 μA

⇒ Which of the following is true in a tape recorder?

Vow is due to variation in motor speed but flutter is due to some other reason

Both vow and flutter are due to variations in motor speed

Flutter is due to variation in motor speed but vow is due to some other reason

Neither vow nor flutter is due to variation in motor speed

⇒ A waveguide operated below cut off frequency can be used as

phase shifter

an attenuator

an isolator

none

⇒ In which group of 8085 instructions condition flags are not affected?

Data transfer group

Arithmetic group

Logical group

Both (a) and (c)

⇒ Low frequency response of amplifier is mainly limited by

input capacitor

bypass capacitor

output capacitor

biasing capacitor

⇒ K maps can be drawn

only for 2 variables

only for 3 variables

only for 4 variables

for any number of variables

⇒ Output of a phase splitter is

a pair of sine waves of unequal amplitude

a pair of sine waves of equal amplitudes

a pair of sine waves of equal amplitudes and opposite phase

a pair of sine waves of unequal amplitudes and opposite phase

⇒ MEWS stands for

Missile Early Warning System

Moving Target Early warning System

Missile Early Warning Signal

Moving Target Early Warning Signal

⇒ Which of the following devices should be used for accurate measurement of a low dc voltage?

Small range moving coil voltmeter

Dc potentiometer

Small range thermocouple voltmeter

Hot wire instrument

⇒ An increase in temperature increases the width of depletion layer.

TRUE

FALSE

⇒ The audio frequency range is

5 Hz to 1 kHz

50 Hz to 20 kHz

16 Hz to 20 kHz

0 Hz to 20 kHz

⇒ It two voltages are

*v*

_{1}= 100 sin (ω

*t*- 30°) and

*v*

_{2}= cos ω

*t*then

*v*

_{1}is leading

*v*

_{2}by 30°

*v*

_{2}is leading

*v*

_{1}by 30°

*v*

_{2}is leading

*v*

_{1}by 60°

*v*

_{1}is leading

*v*

_{2}by 60°

⇒ A bistable multivibrator

has no stable state

has one stable state

has two stable state

none of the above