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Q1. | Which of the following waves do not exist in waveguides? |

A. | TE waves [Wrong Answer] |

B. | TM waves [Wrong Answer] |

C. | TE and TM waves [Correct Answer] |

D. | TEM waves [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 a feedback series regular circuit, the output voltage is regulated by controlling the

magnitude of the I/P voltage

gain of the feed back BJT

reference Voltage

voltage drop across the series pass transistor

⇒ For the circuit, let us assume that R = 1 Ω, L = 10

^{-3}H, and V(t) = 10 cos (1000

*t*+ 30°)V and the differential equation for I(

*t*) is give

7.07 cos (1000

*t*+ 15°) A

70.7 cos (1000

*t*- 30°) A

7.07 cos (1000

*t*- 15°) A

7.07 cos (1000

*t*+ 15°) A

⇒ The attenuation characteristics of a loaded line is similar to that of

low pass filter

high pass filter

band pass filter

band stop filter

⇒ Which group of instructions is used to change sequence of operations in a computer program?

Data transfer group

Branch group

Arithmetic group

Logic group

⇒ For matrix A, A

^{-1}A = 1

TRUE

FALSE

⇒ In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as

transmission efficiency

front to back ratio

loss coefficient

none of the above

⇒ The power to the base unit of a cordless telephone is supplied by

battery

AC mains

both battery and AC mains

either battery or AC mains

⇒ When a binary adder is used as BCD adder, the sum is

correct when it is < 9

correct when it is > 9

correct when it is < 16

none of these

⇒ The probability giving distribution of electrons over a range of allowed energy levels is known as

Maxwell's Distribution

Fermi-Dirac Distribution

Richardson Dushman Distribution

none of the above

⇒ Two sinusoidal waves 1 and 2 have peak values V

_{m1}and V

_{m2}. Wave 1 is leading wave 2 by ∠θ. Which of the following is correct?

*v*

_{1}= V

_{m1}sin θ and

*v*

_{2}= V

_{m2}cos θ

*v*

_{1}= V

_{m1}sin ω

*t*and

*v*

_{2}= V

_{m2}sin (ω

*t*- θ)

*v*

_{1}= V

_{m1}sin (ω

*t*+ θ/2) and

*v*

_{2}= V

_{m2}sin ω

*t*

none of the above

⇒ Which of the following assembler directives in 8085 does not cause any memory location to be used μp?

D S

D B

D W

E Q U

⇒ For the two port of figure,

*z*

_{2226/7 Ω6/7 Ω2/3 Ω1 Ω}

⇒ An ideal op-amp can amplify dc signals

TRUE

FALSE

⇒ Find I in 4 Ω resis

0.0416666666666667

0.5 A

0.75 A

0.95 A

⇒ For the shaded area in Venn diagram of the given figure, the Boolean expressio

AB + BC + CA

ABC + A B C

ABC + A B C

ABC+AB

⇒ An ac network has a power factor of 0.8 lagging for fundamental frequency. If the applied voltage contains thrid and fifth harmonics, the overall power factor will be

more than 0.8 lagging

0.8 lagging

less than 0.8 lagging

0.8 lagging or less

⇒ The resonant frequency of a series resonant circuit is

arithmetic mean of half power frequencies

independent of inductance of the circuit

independent of capacitance of the circuit

geometric mean of half power frequencies

⇒ For any test point

*s*on the real axis, the sum of angular contributions of the complex conjugate poles is

90°

180°

270°

360°

⇒ A 1 ms pulse can be stretched to 1 sec pulse by using

an astable multivibrator

a monostable multivibrator

a bistable multivibrator

a Schmitt trigger circuit

⇒ The width of a radio beam from a 1 m diameter parabolic antenna at 10 GHz is about

100°

50°

5°

1°

⇒ It is desired to reduce distortion in an amplifier from 8% to 2% by using 5% negative feedback. The open and closed loop gains respectively are

60 and 15

15 and 60

6 and 1.5

1.5 and 6

⇒ The power dissipation in a transistor is the product of

emitter current and emitter to base voltage

emitter current and collector to emitter voltage

collector current and collector to emitter voltage

none of the above

⇒ The minimum step size required for a Delta modulator operating at 36 samples/sec to track the signal (here

*u*(

*t*) is the unit step function)

*x*(

*t*) = 125

*t*(

*u*(

*t*) -

*u*(

*t*- 1)) + (250 - 125

*t*) (

*u*(

*t*- 1) -

*u*(

*t*- 2)) So that slope overload is avoided, would be

2

^{-10}

2

^{-8}

2

^{-6}

2

^{-4}

⇒ Calculate the resistivity of

*n*-type semiconductor from the following data, Density of holes = 5 x 10

^{12}cm

^{-3}. Density of electrons = 8 x 10

^{13}cm

^{-3}, mobility of conduction electron = 2.3 x 10

^{4}cm

^{2}/ V-sec and mobility of holes = 100 cm

^{2}/V-sec.

0.43 Ω-m

0.34 Ω-m

0.42 Ω-m

0.24 Ω-m

⇒ RF amplifiers are used in radio receivers for

improved image frequency rejection

improved rejection of adjacent unwanted signals

prevention of re-radiation of the local oscillator through the antenna of the receiver

all of the above

⇒ The voltage transfer functions of two port circuits connected in cascade can be easily found from

product of individual ABCD matrices

product of voltage transfer functions of two networks

sum of

*z*matrices

sum of

*h*matrices

⇒ A + AB =

A

A

A + B

A + B

⇒ Each cell of a static Random Access memory contains

6 MOS transistor

4 MOS transistor, 2 capacitor

2 MOS transistor, 4 capacitor

1 MOS transistor and 1 capacitor

⇒ A dielectric is subjected to alternating field. The dielectric losses are potential to

real part of dielectric constant

imaginary part of dielectric constant

both real and imaginary parts of dielectric constant

either real or imaginary part of dielectric constant

⇒ Which one of the systems described by the following I/P - O/P relations is time invariant

*y*(

*n*) =

*n*

*x*(

*n*)

*y*(

*n*) =

*x*(

*n*) -

*x*(

*n*- 1)

*y*(

*n*) =

*x*(-

*n*)

*y*(

*n*) =

*x*(

*n*) cos 2p

*f*

_{0}

*n*