What is the average magnitude of the Poynting vector 7.00 mi from a radio transmitter broadcasting...
An AM radio station broadcasts isotropically (equally in all directions) with an average power of 3.60 kW. A dipole receiving antenna 70.0 cm long is at a location 4.00 miles from the transmitter. Compute the amplitude of the emf that is induced by this signal between the ends of the receiving antenna.
Question1. A U.S. or Canadian broadcasting licence for a (large) FM radio station stipulates a maximum broadcast power of 100 kW. At any distance from the broadcast antenna the intensity doesn’t quite follow the inverse square law that is described for spherical waves in the videos lectures, because of reflection of the signal off of the ground. But the inverse square law is not a bad approximation, so let’s use it a) Find the intensity of the radio signal from...
An 800 kHz radio signal is detected at a point 3 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 610 mV/m. Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed. The intensity of the radio signal at that point is closest to: 3.5x10-4 W/m2 9.9x10-4 W/m2 O2.5x10-4 W/m2 4.9x10-4 w/m2 7.0x10-4 w/m2
4. An AM radio transmitter broadcasts 62.5 kW of power uniformly in all directions. 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 30.5 km away? (Hint: Half the power will be spread over the area of a hemisphere.) What is the maximum electric field strength at this distance? a. b.
11A.2 What is (a) the wavenumber, (b) the wavelength of the radiation used by an FM radio transmitter broadcasting at 88.0 MHz? 11A.3 An aqueous solution of a triphosphate derivative of molar mass 502 g mol-' was prepared by dissolving 17.2 mg in enough water to make 500 cm of solution and a sample was transferred to a cell of length 1.00 cm. The absorbance was measured as 1.011. Calculate (a) the molar absorption coefficient; (b) the transmittance, expressed as...
An airplane flying at a distance of 14 km from a radio transmitter receives a signal of intensity 14 W/m2. What is the amplitude of the (a) electric and (b) magnetic component of the signal at the airplane? (c) If the transmitter radiates uniformly over a hemisphere, what is the transmission power? (a) Number Units (b) Number Units Units (c) Number
A radio station on the earth's surface emits a sinusoidal wave with average total power 50 kW (Fig. 32.19). Assuming that the trans- mitter radiates equally in all directions above the ground (which is unlikely in real situations), find the electric-field and magnetic field amplitudes Emax and Bmar detected by a satellite 100 km from the antenna 32.19 A radio station radiates waves into the hemisphere shown. Satellite = 100 km
Assume a 55 kW radio station emits Electromagnetic waves uniformly in all directions. How much energy per second crosses a 4.0 m^2 area 50 m from the transmitting antenna? __7____ W What is the rms magnitude of the E field at this point, assuming the station is operating at full power? _______ What is the voltage induced in a 1.0 m long vertical car antenna at this distance?
A radio station transmits isotropically (i.e. in all directions) electromagnetic radiation at the frequency of 98.2 MHz. At a certain distance from the radial station the wave intensity is I = 0.295 W / m ^ 2. a) What will be the intensity of the wave three times the distance of the radial station? b) What is the wavelength of the transmitted signal. c) If the antenna power is 6 MW. At what distance from the source will the wave...
A radio station broadcasts with a power of 50,000 watts. Estimate the average intensity of the wave at a distance of 50 km from the radio transmitting antenna. Assume for the purpose of this estimate that the antenna radiates equally in all directions, so that the intensity is constant over a hemisphere centered on the antenna.