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Calculus, radio dials and the straight-line frequency variable capacitor (journal paper)

Year: 
2010
Researcher(s): 
Khristo Boyadzhiev
Institution: 
Ohio Northern University
Discipline: 
Mathematics

ABSTRACT: Most often radio dials of analogue radios are not uniformly graded; the frequencies are cramped on the left side or on the right side. This makes tuning more difficult. Why are dials made this way? We shall see here that simple calculus can help understand this problem and solve it.

International Journal of Mathematical Education in Science and Technology 41 (2010), no. 5, 667–672