Frequency (Hz) Voltage (V) R=R coil Voltage (V) R=R coil + 100 500 4 V 1.23 V 10
ID: 1794241 • Letter: F
Question
Frequency (Hz)
Voltage (V)
R=Rcoil
Voltage (V)
R=Rcoil + 100
500
4 V
1.23 V
1000
4.4 V
1.72 V
1400
5.2 V
2.56V
1800
6.4 V
3.97
2000
8.2 V
8V
2200
10.8V
10.6V
2400
10.2V
10.4V
2800
6.4V
6.6V
3200
5V
5V
3600
4.4V
4.4V
4000
4.2V
4V
4500
3.8V
3.6V
5000
3.6V
3.6V
6000
3.4V
3.4V
7000
3.4V
3.4V
8000
3.2V
3.2V
1000
3V
3V
-What frequency radio wave is your circuit tuned to if this was acting as a radio?
- What frequency’(s) should the next radio station(s) broadcast at to ensure that listeners don’t hear more than half the power of the current station for R=Rcoil?
Frequency (Hz)
Voltage (V)
R=Rcoil
Voltage (V)
R=Rcoil + 100
500
4 V
1.23 V
1000
4.4 V
1.72 V
1400
5.2 V
2.56V
1800
6.4 V
3.97
2000
8.2 V
8V
2200
10.8V
10.6V
2400
10.2V
10.4V
2800
6.4V
6.6V
3200
5V
5V
3600
4.4V
4.4V
4000
4.2V
4V
4500
3.8V
3.6V
5000
3.6V
3.6V
6000
3.4V
3.4V
7000
3.4V
3.4V
8000
3.2V
3.2V
1000
3V
3V
Explanation / Answer
if this was acting my radio
from the graph the peak is at 2200 Hz apx
hence the radio was tuned to 2200 Hz
for the next radi channel let the frequency be f
power is proportional to V^2
hence
f should coresponf to Vmax/sqroot(2) = 10.7/sqroot(2) = 7.566
this frequency is f = 2650 Hz apx ( from the graph)
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