The U.S. Navy has long proposed the construction of extremely low frequency (ELF waves) communications systems; such waves could penetrate the oceans to reach distant submarines. Calculate the length of a quarter-wavelength antenna for a transmitter generating ELF waves of frequency 75 Hz. How practical is this antenna?

Q: In which one of the following lists are different types of electromagnetic waves ranked in order of…

A: Electromagnetic waves are also known as EM waves. Electromagnetic radiations are composed of…

Q: What is the wavelength of the electromagnetic wave emitted by the oscillator-antenna system of the…

A: Step 1: Step 2:

Q: In a certain UHF radio wave, the shortest distance between positions where the electric and magnetic…

A: Given data: The shortest distance between positions at which the electric and magnetic fields are…

Q: A radio broadcast antenna is located at the top of a steep tall mountain. The antenna is…

A:

Q: During a radiofrequency ablation (RFA) procedure to destroy a cancerous liver tumor, an electrode…

A: Given,The frequency, The AC source power, Length of catheter,Diameter,The curved surface area of the…

Q: The antenna used in a car has an approximate length of about 75 cm typically oriented vertically.…

A: The antenna used in a car has an approximate length of about 75 cm has the length of one quarter of…

Q: When an antenna is connected to a RF cable, the Return Loss is 10 dB; what is the SWR? a. 3dB b. 6dB…

A: Given: Let us consider the given data, Return loss=10 dB To find: The SWR.

Q: An important news announcement is transmitted by radio waves to people who are 85 km away, sitting…

A: important news announcement is transmitted by radio waves to people who are 85 km away, sitting next…

Q: Estimate how long an AM antenna would have to be if it were (a) A or (b)A. AM radio is roughly 1 MHz…

A: Given: The frequency of AM radio is f= 1 MHz. The expression for wavelength (λ) is: λ=cf Here, c…

Q: Consider a bright star in our night sky. Assume its distance from Earth is 79.5 light-years (ly) and…

A: Given data : P=4.00*1028W r=79.5 light years

Q: Citizen's band (CB) radio utilizes frequencies between commercial AM and FM. What is the frequency…

A: The following data are given: Wavelength of the CB channel, λ=11.90m

Q: A 155-turn flat coil of wire, 32.5 cm in diameter, is acting as an antenna for FM radio at a…

A: a)Write the equation for intensity

Q: Which of the following statements is INCORRECT? The visible spectrum is a relatively small band of…

A: Electromagnetic waves.

Q: Receiving radio antennas can be in the form of conductinglines or loops. What should the orientation…

A: The electrons experience an electric force along its length due to the oscillating electric field.…

Q: For cellphone 4G LTE operates at frequency 1.90 GHz.  What is corresponding wavelength the cellphone…

A: Given,

Q: What inductance must be connected to a 19 pF capacitor in an oscillator capable of generating 480 nm…

A: Given: The capacitance of the capacitor C = 19 pF. The frequency of the oscillator f = 480 nm.

Q: An 79.5MHz source with a total power of 70.0kW is located 3.00km away from us and radiates uniformly…

A: According to Faraday's law of induction, induced emf can be defined as the negative rate of change…

Q: At what distance from a 24 mW point source of electromagnetic waves is the electric field amplitude…

A: Power of the wave is P = 24 mW Electric field amplitude is E = 0.010 V/m

Q: During the Cold War, American submarines operated as "lone wolves" at extreme ocean depths for many…

A: Given:frequency of signals f=82 Hz signals: radio signal v=c=3*108  m/s

Q: Give your explanation of how a microwave oven works.  Have you ever noticed interference with your…

A: When we power on the microwave, heat energy is converted into Microwave energy. Microwaves are…

Q: List the main types of electromagnetic waves in order öf increasing frequency. O radio waves,…

A: Make a table of the EM waves with their frequency as shown below:

Q: An outdoor WiFi unit for a picnic area has a 100-mW output and a range of about 30.9 m. What output…

A:

Q: In order to maximize power, most broadcast antenna have a length that is 1/4 of the wavelength of…

A: The most efficient to the broad cast electromagnetic wave is                                       L…

Q: Consider a bright star in our night sky. Assume its distance from Earth is 86.3 light-years (ly) and…

A:

Q: In Microwave diathermy The frequency used is .a 750MHZ .b 900MHZ .c 800MHZ .d 600MHZ

A: Microwave diathermy is used to heat superficial muscles and joints such as the shoulder. It is also…

Q: Problem 8. A) What is the transmittance at an open-circuited end of a transmission line? Justify…

A: Note: “Since you have posted multiple questions, we will provide the solutiononly to the first…

Q: In which one of the following lists are different types of electromagneticwaves ranked in order of…

A: The increasing order of wavelength is as follows, gamma rays> x-rays. Ultraviolet rays >…

Q: Suppose a transmitter puts a 50-W signal into a directional antenna with a gain of 1.64. Determine…

A: Given data :             Power input , P = 50 W             Gain, G = 1.64             Distance, D =…