Question

The radio waves from your favorite radio station has a wavelength of 366m. The station broadcasts with a total power of 40kW. The radio waves are hitting your car antenna which is 30km away from the station’s transmitter.

a) What is the electric field strength of the radio waves at your car antenna?

b) The radio receiver in your car uses a series RLC circuit to tune in the radio station. The circuit has a resistance of 0.50W, an inductance of 2.0mH, and a variable capacitor. What capacitance is needed to listen to your favorite radio station?

c) Using the values of R, L, and C from part (b), what is the impedance of the RLC circuit at the frequency of your favorite radio station? What is the impedance of the RLC circuit at a frequency that is 10kHz greater than that of your favorite station?

Answer #1

You've decided to build a radio to listen to your favourite FM
radio station, which broadcasts at 93.90 MHz. For the tuner, you'll
be using an RLC circuit, but the only inductor you happen to have
on hand has a value of 0.510 μH. Unfortunately, there's another
radio station — which you don't want to listen to — at a nearby
frequency of 93.50 MHz. To prevent any interference from this 93.50
MHz radio station, you want the peak current...

AN FM radio station broadcasts at a frequency of 96 MHz.What
inductance should be paired with a 6.0 pF capacitor to build a
receiver circuit for this station?

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 station broadcasts at 810 kHz. A.) What is the wavelength of
the radio waves? B.) If the magnetic field of an EM wave from the
radio station has a peak value of 5.44x10^(-9), what is the peak
value of the electric field? C.) How much energy is transported by
this wave across 30.0cm^2 in one hour?

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...

A radio can be tuned into a particular station frequency by
adjusting the capacitance in an L-C circuit. Suppose that
the minimum capacitance of a variable capacitor in a radio is 4.19
pFpF .
a. What is the inductance LLL of a coil connected to this
capacitor if the oscillation frequency of the L-C
circuit is 1.58 MHzMHz , corresponding to one end of the AM radio
broadcast band, when the capacitor is set to its minimum
capacitance?
b. The...

Question 1:An amateur radio operator wishes to
build a receiver that can tune a range from 13.6 MHzMHz to 15.5
MHzMHz . A variable capacitor has a minimum capacitance of 85 pFpF
.
Part A; What is the required value of the constant
inductance?
Part B:What is the maximum capacitance used on the variable
capacitor?
Question 2: Calculate the displacement current
IDID between the square plates, 8.2 cmcm on a side, of a capacitor
if the electric field is changing...

Your favorite FM radio station has a wavelength of 1.689 meters.
Convert that length to feet using the centimeter to inch conversion
factor.
How many significant figures should there be in your answer?

Suppose a 20-kW radio station emits EM waves uniformly in all
directions.
Part A
How much energy per second crosses a 1.4 m2 area 1 km from the
transmitting antenna?
Express your answer to two significant figures and include the
appropriate units.
Part B
What is the rms magnitude of the
E⃗ field at this point, assuming
the station is operating at full power?
Express your answer to two significant figures and include the
appropriate units.
Part C
What is...

Frequency & Wavelength
For this week’s assignment, please answer EACH
of the following questions/prompts,and post them to the drop box as
a single document.
Explain how medical magnetic resonance imaging (MRI) exploits
the magnetic properties of the nucleus.
Explain how a sound is actually a form of energy? In what medium
do sound waves travel?
A current is connected to 115-volt power source. If a current of
5 amps flows in the wire, what is the resistance of the
circuit?...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 5 minutes ago

asked 13 minutes ago

asked 13 minutes ago

asked 40 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago