Related InterviewSolutions

• What is the value of maximum usable frequency when the incident angle is 60° and the critical frequency is 4.5MHz?(a) 4.5MHz(b) 2.25MHz(c) 9MHz(d) 18MHzThe question was asked in my homework.The query is from Maximum Usable Frequency topic in chapter Virtual Height, Critical Frequency and Muf of Antennas
• Skip distance is the _____(a) Minimum distance at which wave returns back at the lowest possible frequency(b) Maximum distance at which wave returns back at the critical frequency(c) Minimum distance at which wave returns back at the critical angle(d) Maximum distance at which wave returns back at the lowest possible frequencyI had been asked this question in semester exam.My doubt is from Maximum Usable Frequency topic in portion Virtual Height, Critical Frequency and Muf of Antennas
• Find the take-off angle for the flat earth surface with θi = 75.(a) 15(b) 30(c) 105(d) 75I have been asked this question by my school principal while I was bunking the class.My question comes from Multi Hop Propagation topic in section Virtual Height, Critical Frequency and Muf of Antennas
• Relation between skip distance d, virtual height d and MUF fMUF is ______(a) \(d=2h\sqrt{[\frac{f_{MUF}^2}{f_c^2}-1]}\)(b) \(h=2d\sqrt{[\frac{f_{MUF}^2}{f_c^2}-1]}\)(c) \(d=2h(\frac{f_{MUF}^2}{f_c^2}-1)\)(d) \(h=2d(\frac{f_{MUF}^2}{f_c^2}-1)\)I have been asked this question in homework.I'd like to ask this question from Virtual Height in section Virtual Height, Critical Frequency and Muf of Antennas
• The propagation of wave from transmitter to receiver without touching the ground is called as ___(a) Single hop distance(b) Virtual height(c) Actual height(d) Multi-hopThis question was addressed to me during an interview.I need to ask this question from Multi Hop Propagation topic in chapter Virtual Height, Critical Frequency and Muf of Antennas
• Suppose a ray is incident normally in the ionosphere region with electron density 25×10^10/cm^3,then the Maximum usable frequency is _____(a) 5GHz(b) 45MHz(c) 4.5MHz(d) 125GHzI had been asked this question by my college professor while I was bunking the class.My doubt is from Maximum Usable Frequency in section Virtual Height, Critical Frequency and Muf of Antennas
• Which of the following is true when a ray is incident normally in an Ionosphere region?(a) MUF is equal to critical frequency(b) MUF is greater than critical frequency(c) MUF is less than critical frequency(d) MUF is zeroI have been asked this question by my school teacher while I was bunking the class.My query is from Maximum Usable Frequency in chapter Virtual Height, Critical Frequency and Muf of Antennas
• What is the critical frequency when the electron density in the F1 layer is 20×10^10/cm^3?(a) 40.2GHz(b) 4.02 MHz(c) 40.2 MHz(d) 40.2HzThis question was addressed to me in unit test.This interesting question is from Critical Frequency in division Virtual Height, Critical Frequency and Muf of Antennas
• Calculate the skip distance for the flat earth when a wave is reflected in an ionosphere at a height of 100km at a take-off angle 10°.(a) 172km(b) 35.26km(c) 17.25km(d) 35.26mThis question was posed to me in an interview.My doubt is from Multi Hop Propagation in section Virtual Height, Critical Frequency and Muf of Antennas
• The propagation of wave from transmitter to receiver by touching ground in between them and goes through different layers is called _____(a) Multi-hop single layer(b) Single hop multi layer(c) Multi hop multi layer(d) Single hop single layerI had been asked this question in semester exam.My doubt is from Multi Hop Propagation topic in division Virtual Height, Critical Frequency and Muf of Antennas