A rectangular waveguide is 4.2 cm by 1.85 cm. The cut-off frequency of the dominant mode through this waveguide is 3.57 GHz
Description : A rectangular waveguide is 5.1 cm by 2.4 cm (inside dimension). The cut off frequency of the dominant mode is
Last Answer : A rectangular waveguide is 5.1 cm by 2.4 cm (inside dimension). The cut off frequency of the dominant mode is 2.94 GHz
Description : Draw the field pattern of circular waveguide for its dominant mode.
Last Answer : TE1,1 Mode is the dominant mode in circular waveguides. In TEm,n/ TMm,nthe letter m denotes the number of full-wave intensity variations around the circumference and n represents the number of half-wave ... changes radially out from the center to the wall. (Cylindrical co-ordinates are used).
Description : The dominant mode in cylindrical waveguide
Last Answer : The dominant mode in cylindrical waveguide TE11
Description : In a circular waveguide the dominant mode is: (1) TE01 (2) TE11 (3) TE20 (4) TE21
Last Answer : . In a circular waveguide the dominant mode is: TE11.
Description : Describe rectangular waveguide in TE & TM mode.
Last Answer : i. Mode is defined as all possible configuration of electric and magnetic field which can exists in the waveguide. ii. Modes in rectangular waveguides are labeled TEm,nif they are transverse ... exist in rectangular waveguides. The formula for characteristic wave impedance for TM modes is,
Description : When a dominant mode wave guide not terminated in its characteristic impedance is excited with a 10 GHZ signal then if d is the distance between two successive minima of the standing wave in the guide then (A) d = 1.5 cm (B) d is less then 1.5 cm (C) d is greater then 1.5 cm (D) d = 3 cm
Last Answer : When a dominant mode wave guide not terminated in its characteristic impedance is excited with a 10 GHZ signal then if d is the distance between two successive minima of the standing wave in the guide then d = 1.5 cm
Description : Choose which of following condition is not required for a waveguide to exist. a) The dimensions should be in accordance with desired frequency b) Cut-off frequency should be minimum 6GHz c) The shape should be spherical d) No specific condition is required for waveguide design
Last Answer : c) The shape should be spherical
Description : Define the term w.r.t. waveguide: (i) Cut-OFF frequency (ii) Group Velocity
Last Answer : Group velocity: It is defined as the rate at which the wave propagates through the waveguide and is given by The group velocity is also can be defined as the velocity of energy flow ... rectangular waveguide at a frequency below fc TE1,0. This is absolute cut off frequency of the waveguide.
Description : A metallic sheet is of rectangular shape with dimensions 48 cm x 36 cm. From each of its corners, a square of 8 cm is cut-off and an open box is made of the remaining sheet. Find the volume of the box. -Maths 9th
Last Answer : When squares of 8 cm is cutt-off from rectangulare sheet then, Length of box (l) = (98 - 8 - 8) = 32 cm Breadth of box (b) = (36 - 8 - 8) = 20 cm Height of box (h) = 8cm ∴ Volume of box = lbh = 32 x 20 x 8 = 5120 cm3
Description : Rectangular waveguides dominate the circular waveguides. Find the reason. a) Low cut-off frequency b) Easy to design c) More wave propagation d) The statement is false
Last Answer : b) Easy to design
Description : Propagation mode of microwave in a waveguide is known as _______. A. TM B. TE C. SW D. TEM
Last Answer : B. TE
Description : The electric field is perpendicular to the "a" dimension of a waveguide in what mode?
Last Answer : TE.
Description : A single-mode cable does not suffer from: a. modal dispersion b. chromatic dispersion c. waveguide dispersion d. all of the above
Last Answer : a. modal dispersion
Last Answer : Tropospheric mode of propagation is used in VHF.
Description : What determines the frequency, bandwidth, and power handling capability of a waveguide probe?
Last Answer : Size and shape
Description : When the frequency is decreased so that two quarter wavelengths are longer than the "a" (wide) dimension of the waveguide, what will happen?
Last Answer : Energy will no longer pass through the waveguide.
Description : What happens to the bus bar dimensions of the waveguide when the frequency is increased?
Last Answer : The bus bar becomes wider.
Description : The frequency range of a waveguide is determined by what dimensions?
Last Answer : . The "a" dimension.
Description : In a waveguide, what is a frequency that would cause angles of incidence and reflection to be zero degrees?
Last Answer : Critical Frequency
Description : At what frequency compared to the cutoff frequency of a waveguide will the wavefronts be reflected back and forth across the guide (setting up standing waves) and no energy
Last Answer : UHF receiving antenna
Description : A metallic sheet is of rectangular shape with dimensions 28m × 36m. From each of its corners, a square is cut off so as to make an open box. -Maths 9th
Last Answer : R.E.F image Volume of box =l×b×h From the diagram l=48−2(8) ∵ Two square formed side =32m b=36−2(8) =20m Also h=8m from question ∴ Volume =32×20×8 =5120m3
Description : 1. Which rays can pass through 20 cm thickness of steel? 2. Which characteristic is common among parrot, platypus and kangaroo? 3. In India, in which banking is the Public Sector is ... Aeolian process? 20. Who was instrumental in bringing the Extremists and the Moderates together at Lucknow?
Last Answer : Answer : 1. ã-rays 2. Functional post anal tail 3. Commercial banking 4. Kolkata 5. Pamstern 6. Retro virus 7. Lord Pethick Lawrence 8. Chlorine 9. Varanasi 10. Jawaharlal Nehru 11. Gasoline ... 17. By infrared rays 18. State Bank of India 19. Corrosion, attrition, deflation 20. Annie Besant
Description : Water is following at the rate of 5 km/hr through a pipe of diameter 14 cm into a rectangular tank which is 50 m long -Maths 9th
Last Answer : Convert all to metres: 5 km = 5000 m 14 cm = 0.14 m 7 cm = 0.07 m Find the radius: Radius = Diameter 2 Radius = 0.14 2 = 0.07 m Find the amount of water that flowed out in an hour: Volume ... hours needed: Number of hours = 154 77 = 2 hours It takes 2 hours to fill up the tank to rise by 7 cm
Description : What is considered the most efficient mode in terms of energy transfer in waveguides? A. Dominant mode B. Normal mode C. Conventional mode D. Vertical mode
Last Answer : A. Dominant mode
Description : A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none ... ? (a) Sex-linked dominant (b) Sex-linked recessive (c) Sex-limited recessive (d) Autosomal dominant
Last Answer : (b) Sex-linked recessive
Description : The Ku frequency band used in satellite communication (for uplink and downlink) is: (1) 14 GHz and 11 GHz (2) 30 GHz and 20 GHz (3) 70 GHz and 50 GHz (4) 60 GHz and 45 GHz
Last Answer : The Ku frequency band used in satellite communication (for uplink and downlink) is: 14 GHz and 11 GHz
Description : In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the transmission bit rate is
Last Answer : In a PCM system the number of quantization level are 16 and the maximum signal frequency is 4 KHz the transmission bit rate is 32 Kbits/sec
Description : The frequency range 30MHz - 300MHz is (A) medium frequency (B) very high frequency (C) super high frequency (D) Infrared frequency
Last Answer : The frequency range 30MHz - 300MHz is very high frequency
Description : In commercial FM broadcasting, the maximum frequency deviation is normally (A) 5 KHz (B) 15 KHz (C) 75 KHz (D) 200 KHz
Last Answer : In commercial FM broadcasting, the maximum frequency deviation is normally 75 KHz
Description : In a radio transmitter, the frequency of the crystal oscillator will be stable for a long time if the quality factor of the crystal resonator is (a) > 100 (b) > 500 (c) > 1000 (d) > 20000
Last Answer : In a radio transmitter, the frequency of the crystal oscillator will be stable for a long time if the quality factor of the crystal resonator is > 1000
Description : For an antenna to be frequency-independent, it should expand or contract in proportion to the (a) gain (b) directivity (c) wavelength (d) impedance
Last Answer : For an antenna to be frequency-independent, it should expand or contract in proportion to the impedance
Description : The frequency range of FM radio is
Last Answer : The frequency range of FM radio is 88MHz to 108MHz
Description : A tuned circuit has a Q of 100 at its resonant frequency of 500 kHz. Its bandwidth is _____kHz. (A) 50000 (B) 0.2 (C) 600 (D) 5
Last Answer : A tuned circuit has a Q of 100 at its resonant frequency of 500 kHz. Its bandwidth is 5 kHz.
Description : The signal is extended from 96KHz to 100KHz, so the minimum sampling frequency required is (a) 8KHz (b) 200KHz (c) 4KHz (d) 100KHz
Last Answer : 200KHZ
Last Answer : If a wave has frequency of 2 Hz, it has a period of 1/2 s.
Last Answer : In CCIR system B standard, the line frequency 15,625 lines/sec.
Last Answer : The maximum Usable Frequency is dependent on the electron density of the ionospheric layer.
Last Answer : In the telephone, the dial tone has a frequency of 33 Hz.
Description : When electromagnetic wave are propagated through a waveguide, they A. are reflected from the walls but do not travel along them B. travel along all four walls of the waveguide C. travel along the broader walls of the guide D. travel through the dielectric without touching the walls
Last Answer : A. are reflected from the walls but do not travel along them
Description : How many inches is 85.5 cm?
Last Answer : 85.5 cm = 33.66 inches
Description : Dry land farming in India is largely confined to areas with rainfall less than - a. 100 cm b. 85 cm c. 80 cm d. 75 cm
Last Answer : d. 75 cm
Description : A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2 ... area of steel required, is (A) 14 cm (B) 15 cm2 (C) 16 cm2 (D) 17 cm
Last Answer : Answer: Option C
Description : The minimum width of a stair in residential buildings, is (A) 55 cm (B) 70 cm (C) 85 cm (D) 100 cm
Description : How many coins 0.75 cm in diameter and 1/8 cm thick must be malted down to form a rectangular solid whose edges are 5 cm. 4 cm and 3 cm? a.584 b.1087 c.0.00001745 sec-1 d.1234 e.2174
Last Answer : b. 1087
Description : A rectangular piece of paper is 22 cm long and 10 cm wide. -Maths 9th
Last Answer : Since rectangular piece of paper of rolled along its length. ∴ 2πr = 22 r = 22 × 7 / 2 × 22 = 3.5 cm Height of cyclinder (h) = 10 cm ∴ Volume of cyclinder = πr2h = 22 / 7 × 3.5 × 3.5 × 10 = 385 cm3.
Description : A design is made on a rectangular tile of dimensions 50 cm x 17 cm as shown in figure. -Maths 9th
Last Answer : According to question find the the total area of the design and the remaining area of the tiles.
Description : Metal spheres, each of radius 2 cm, are packed into a rectangular box of internal dimensions 16 cm x 8 cm x 8 cm. -Maths 9th
Last Answer : Volume of rectangular box=lbh=16(64)=1024cm3 Volume of sphere=34πr3=33.5238cm3 16 sphere=16(33.5238)=536.3808 Volume of liquid=1024−536.3808=488cm3