Question

FM radio station KRTH in Los Angeles broadcasts on an assigned frequency of 101 MHz with a power of 50,000 W.

(a) What is the wavelength of the radio waves produced by this
station?

(b) Estimate the average intensity of the wave at a distance of
44.4 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.

(c) Estimate the amplitude of the electric field at this
distance.

Answer #1

Suppose a popular FM radio station broadcasts radio waves with a
frequency of 90. MHz . Calculate the wavelength of these radio
waves. Round your answer to 2 significant digits.

A radio antenna broadcasts a 1.0 MHz radio wave with 25 kW
power. Assume the radiation is emitted uniformly in all directions.
1) what is the wave's intensity 30 km from the antenna 2) what is
the electric field amplitude at this distance? PLEASE SHOW ALL
WORK

An FM radio station broadcasts electromagnetic radiation at a
frequency of 101.7 MHz. The wavelength of this radiation is
________ m.

An AM radio station broadcasts an electromagnetic wave with a
frequency of 712 kHz, whereas an FM station broadcasts an
electromagnetic wave with a frequency of 89.1 MHz. How many AM
photons are needed to have a total energy equal to that of one FM
photon?

An AM radio station broadcasts an electromagnetic wave with a
frequency of 916 kHz, whereas an FM station broadcasts an
electromagnetic wave with a frequency of 91.8 MHz. How many AM
photons are needed to have a total energy equal to that of one FM
photon?

A
150kW radio station broadcasts it’s signal uniformly in all
directions.
Part A. What is the average intensity of its signal at a
distance of 8.55km from the station?
Part B. What is the rms value of the electric field in this
radio wave?
Part C. If a 1.22m receiving antenna is oriented parallel to
the electric field of the radio wave, what rms voltage appears
between its ends?

A radio station transmits isotropically (that is to say in all directions) electromagnetic radiation at the frequency of 98.6 MHz. At a certain distance from the radial station the intensity of the wave is I = 0.291 W / m^2.
a) What will be the intensity of the wave at a quarter of the distance from the radio station?
b) What is the wavelength of the transmitted signal?
If the antenna power is 8 MW.
c) At what distance from...

The broadcast transmitter transmits a sinusoidal radio signal at
a frequency of 95 MHz with a transmission power of 55 kW. The radio
signal is received at a distance of 2.5 km with a circular wire
antenna with a diameter of 18 cm. What is the maximum possible
electromotive force induced in the loop antenna, assuming that the
transmitted power is evenly distributed in all directions? Far from
the transmitter, the wave can be locally modeled as a planar wave....

Problem 1. The emitting antenna of a 100 kW radio station
radiates equally in all directions. What are the magnitudes Emax
and Bmax (a) 100 m from the antenna and (b) 50 km from the antenna?
(c) For these two distances from the antenna, calculate the maximum
potential difference caused between the ends of a receiving antenna
that is 1.0 m long, assuming the antenna is aligned perfectly with
the electric field of the radio wave

A radio transmitting station operating at a frequency of 115 MHz
has two identical antennas that radiate in phase. Antenna B is 8.95
m to the right of antenna A. Consider point P between the antennas
and along the line connecting them, a horizontal distance x to the
right of antenna A.
A) For what values of x will constructive interference occur at
point P? Enter your answers in ascending order separated by a
comma.

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