The base station of a GSM 900 system (200kHz BW) has a height of 10m and is 10km away from the mobile user, who has a height of 2m. The antenna gain of the base station and the mobile are 2 and 3 dBi respectively. The transmit power is 1 dBW. ▪ Calculate the received power with ground reflection
Q: A microwave source produces pulses of 16.0-GHZ radiation, with each pulse lasting 1.00 ns. A…
A: Given, The average power, P=30kWP=30×103W The radius, r=4.5×10-2m Frequency of source, f=16×109Hz…
Q: An airplane flying at a distance of 14 km from a radio transmitter receives a signal of intensity 12…
A:
Q: Radio station KSON in San Diego broadcasts at both 1240 kHz (AM) and 97.3 MHz (FM). a) Which of…
A:
Q: An AM radio station broadcasts isotropically (equally in all directions) with an average power of…
A: The intensity of the wave at the reciever is , I = Pavg / A I = (3.80 × 10³) / 4πr² I = (3.80 ×…
Q: What is the frequency of infrared light emitted by an LED in a remote control with a wavelength of…
A: GivenSpeed of light is given as c= 3.00 x 108m.s-1Wavelenth of light is λ=906nm
Q: Consider a bright star in our night sky. Assume its distance from Earth is 82.9 light-years (ly) and…
A: (a) Intensity of star light at earth 5.17 nw/m2 (b) power of star light earth intercepts 0.66 MW
Q: An FM broadcast station has a transmitting antenna located 50 m above average terrain. How far away…
A:
Q: On its highest power setting, a certain microwave oven projects 1.00 kW of microwaves onto a 30.0 by…
A: Given: Power of microwave P = 1.0 kW = 1000 W. Area A = 30.0cm×40cm=0.3×0.4 m2
Q: An AM radio station broadcasts isotropically (equally in all directions) with an average power of…
A:
Q: The region of the EMR spectrum in which the ground-penetrating radar is classified is
A:
Q: (a) Calculate the range of wavelengths for AM radio given its frequency range is 540 kHz to 1602…
A: ( If you have any queries please feel free to ask me).
Q: An AM radio station broadcasts isotropically (equally in all directions) with an average power of…
A:
Q: 4. The radioactive isotope Cobalt 60 has a half-life of 5.27 years. In that period of time half of…
A:
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: The figure shows the popular dish antenna that receives digital TV signals from a satellite. The…
A: Given that- The averge intensity of electro magnetic wave(I)=7.80×10^-14 W/m^2 Antena…
Q: a) Consider a laser beam propagating through free space. The beam has an average power of 5 mW (a…
A: As per the guideline we will answer first question.
Q: Suppose the maximum safe intensity of microwaves for human exposure is taken to be 1.00 W/m2. a)…
A: The maximum safe intensity of microwaves for Human exposure is taken to be 1.00 W/m2
Q: The distance to the North Star, Polaris, is approximately 6.44 x 1018 m. (a) If Polaris were to burn…
A:
Q: The average intensity within the 3.4-mm radius circular spot illuminated by a helium-neon laser…
A: Given Data: Radius (r) = 3.4 mm = 3.4×10-3 m.Average intensity (I) = 53.5 W/m2. To Determine: (a).…
Q: Energy carried by an EM wave coming through the air can be used to light a bulb that is not…
A: Given : Maximum power (Po) = 1.05 W Angle (θ) = 71°
Q: Two identical short dipole antennas are driven in phase with each other with equal strength and emit…
A: A loose definition of polarization is the direction in which electromagnetic fields emanate from an…
Q: An AM radio station broadcasts isotropically (equally in all directions) with an average power of…
A: The intensity of the wave is given by, I=Pavg4πr2 Here, Pavg is the average power of broadcasting…
Q: Satellite TV is broadcast from satellites that orbit the earth. Their antennas broadcast a 15 kW…
A: So to solve this question we first need to find the intensity (I) , which can be derived by…
Q: Microwaves are produced with an intensity of 1.42 W/m which are polarized at an angle of -84.1…
A:
Q: A microwave source produces pulses of 21.0 GHz radiation, with each pulse lasting 1.00 ns. A…
A:
Q: The state-of-the-art digital air surveillance radar used in civil aviation emits its signal equally…
A: Average power P = 22.0 kW = 22000 W distance from the radar tower r = 7.76 km = 7760 m
Q: An ideal polarizer with its transmission axis rotated 30° to the vertical is placed in a beam of…
A: Given data: Intensity of unpolarized light (I0) = 10 W/m2 Angle (θ) = 30°,to the vertical Required:…
Q: The magnetic field component of an EM wave propagating through a nonmagnetiċ médlum H = Ho is H = 25…
A:
Step by step
Solved in 3 steps
- Suppose the maximum safe average intensity of microwaves for human exposure is taken to be 2.00 W/m?. If a radar unit leaks 10.0 W of microwaves (other than those sent by its antenna) uniformly in all directions, how far away, rmina must you be to be exposed to an average intensity considered to be safe? Assume that the power spreads uniformly over the area of a sphere with no complications from absorption or reflection. min m What is the maximum electric field strength Eo at this distance? The permittivity of free space is €o = 8.854 × 10-12 C²/(N-m²). The speed of light is e = 3.00 x 10° m/s. Eo V/m Note: Early radar units leaked more than modern ones do. This caused identifiable health problems, such as cataracts, for people who worked near them. Question Credit: OpenStax College PhysicsIf the Average Power Density of an antenna is given as: 60sin (0) Wav = (WIm²) a) What is the value of the Average Power Density at (0 = 30°) and (r = 2 m) = %3D (W/m?) b) What is the value of the Radiation Intensity at (0 = 45°) and (r = 3 m) = %3D %3D (W/Steradian) c) What do we call an antenna that has repeated (more than one identical) elements?P9 E4
- Two friends are playing with hand-held radio transcelvers which have dipole antennas. If the antenna of the transmitting radio is vertical, and the antenna of the receiving radio is at an angle 0 to the vertical, what is the recelved power as a percentage of the maximum possible received power at the receiving antenna in the following cases? (a) e - 22.00 % (b) e - 47.0° % (c) e - 79.0°consider a bright star in our sky. assume its distance from earth is 38.3 light-year (ly) and its power output is 4.00 * 10^28 W. about 100 times that of the sun. one light-year is the distance traveled by light through a vacuum in one year. a. find the intensity of the starlight at the earth. b. find the power of the starlight at the earth intercepts ( the radius of earth is 6.38 * 10^6 m .)The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 1.30 mm in diameter, what is its intensity? 1.88e2 W/m2 (b) Find the peak electric field strength. 1.255e-6 What is the relationship between intensity and electric field strength? V/m (c) Find the peak magnetic field strength. 3.765e-6 What is the relationship between electric field strength and magnetic field strength in an electromagnetic wave? T
- The average intensity within the 3.4-mm radius circular spot illuminated by a helium-neon laser pointer is 53.5 W/m². (a) What is the peak amplitude of the beam's electric field component? Emax = |0.53 N/C (b) What is the rms amplitude of the beam's magnetic field component? Brms = 0.00125 X HT (c) What is the average output power of the laser? Pav = 7.77 avg x mWA parabolic satellite dish is somewhat bowl-shaped, but the incoming signal is captured across its circular cross-section. A parabolic satellite dish with radius, R = 1.5 m, picks up a TV signal with a peak electric field strength of 74 mV/m. (a) What is the average intensity of the incoming signal? W/m² (b) What is the average (total) power received by the satellite dish? W R (c) What is the average output power of the orbiting transmitter if it broadcasts uniformly over an area of 1.5 x 10¹3 m²? MWA 4.25 m diameter university communications satellite dish receives TV signals that have a maximum electric field strength (for one channel) of 7.5 μV/m . (a) What is the intensity of this wave in W/m2? (b) What is the power received by the antenna in W? (c) If the orbiting satellite broadcasts uniformly over an area of 1.50 × 1013 m2 (a large fraction of North America), how much power does it radiate in W?
- A quarter-wave monopole radio antenna (also called a Marconi antenna) consists of a long conductor of one quarter the length of the transmitted wavelength. The lower end of the antenna is connected to a conducting ground plane (often simply the Earth) which reflects the transmitted signal, creating an effective antenna length of a half wavelength. (a) What must be the height of the antenna (in m) for a radio station broadcasting at 569 kHz? (b) What must be the height of the antenna (in m) for radio stations broadcasting at 1,750 kHz?An AM radio transmitter broadcasts 54.0 kW of power uniformly in all directions. (a) Assuming all of the radio waves that strike the ground are completely absorbed, and that there is no absorption by the atmosphere or other objects, what is the intensity (in W/m2) 26.0 km away? (Hint: Half the power will be spread over the area of a hemisphere.) W/m2 (b) What is the maximum electric field strength (in V/m) at this distance? V/m