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Unformatted text preview: Speeding Car Given: F i n d : MHz f 4 . 103 ? f 990 Q ? v MHz f 5 . 103 ? m d 390 ? t Imagine there is a radio tower at the intersection of Green and Goodwin. You are parked in your new car at Green and Lincoln, i.e., directly east of the tower. Unfortunately, your car's radio is broken so that it is permanently set on 103.4 MHz (i.e., that is the resonant frequency of the receiver circuit). (a) If the radio tower were to broadcast directly at 103.4 MHz, the power transferred to the radio circuit would be P max . If the receiver circuit has a quality factor Q = 990, how different (in kHz) could the carrier frequency be (either higher or lower) and still have the power transferred to the radio be at least half its maximum on-resonance value P max ? (b) Unfortunately, the radio tower is actually broadcasting at 103.5 MHz. Clever 212 student that you are, you think to drive your car either away from the tower or towards it, in order that the broadcast...
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- Fall '10