Principles of Physics 11th ISV Edition · Electromagnetic Oscillations and Alternating Current · Problem 41
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Walker, Halliday & Resnick — Electromagnetic Oscillations and Alternating Current: Problem 41
41 A variable capacitor with a range from 10 to 410 pF is used with a coil to form a variable-frequency LC circuit to tune the input to a radio. (a) What is the ratio of maximum frequency to minimum frequency that can be obtained with such a capacitor? If this circuit is to obtain frequencies from 0.54 MHz to 1.60 MHz, the ratio computed in (a) is too large. By adding a capacitor in parallel to the variable capacitor, this range can be adjusted. To obtain the desired frequency range, (b) what capacitance should be added and (c) what inductance should the coil have?
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주어진 조건: 41 A
구하는 것: (a) What is the ratio of maximum frequency to minimum frequency; (a) is too large; (b) what capacitance should be added and
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Principles of Physics · 11th ISV Edition
저자: Walker, Halliday & Resnick
출판사: Wiley
단원: Electromagnetic Oscillations and Alternating Current