In a series-fed Hartley oscillator, what happens if the frequency-determining capacitance is increased?

Prepare for the Avionics Electronics Technician Test with comprehensive flashcards and multiple-choice questions. Each query is designed to enhance your understanding and is accompanied by detailed explanations. Ace your exam today!

In a series-fed Hartley oscillator, the frequency of oscillation is determined by the inductance and capacitance in the circuit, typically expressed by the formula:

[ f = \frac{1}{2\pi\sqrt{L(C_1 + C_2)}} ]

where ( L ) represents the inductance and ( C_1 ) and ( C_2 ) are the frequency-determining capacitances. When the capacitance is increased, the term ( (C_1 + C_2) ) in the denominator becomes larger, which inversely affects the frequency. Consequently, increasing the frequency-determining capacitance will lead to a decrease in the oscillator frequency.

This fundamental relationship indicates that with higher capacitance, the circuit requires a longer time to complete an oscillation cycle, thereby resulting in a lower frequency of oscillation. Understanding this relationship helps in designing and adjusting oscillators for specific frequency outputs in various applications.

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