If you are referring to a capacitor that connects to a 'tweeter' (the smaller high frequency speaker) it's function is to filter out the lower (bass) frequency signals, a capacitor 'blocks' direct currents (DC) and as a result the electrical 'signal' to a loudspeaker gets 'closer' to a direct current, the lower the frequency, so the capacitor is 'happy' to let high frequency (treble) signals pass through it, but resists the signal as the sound frequency decreases, down to the lower (bass) signals.
The function of a capacitor in a washing machine is to store a charge. This charge is what starts the washer.
The reactance of a capacitor is a function of -- the capacitance of the capacitor -- the frequency of the voltage across the capacitor
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the capacitor and its associated resistor set the time constant.
To connect it to the circuit.
The main role of dielectrics in capacitors is to increase the value of capacitance of the capacitor.
A fixed capacitor has a fixed capacitance (within certain limits influenced by aging). So it can fulfill any function that a (variable) capacitor fulfills, beside changing its capacitance easily (e. g. by turning a wheel).
A capacitor is placed across the supply of a fluorescent lamp circuit to correct the power factor
In electronic circuits a capacitor is used to pass AC and block DC.
resistor
The function of the speaker it to talk about the topic for which s/he was engaged, or to the common interest of the group. If you mean an electronic device , a speaker is to amplify sound.
The function of the speaker it to talk about the topic for which s/he was engaged, or to the common interest of the group. If you mean an electronic device , a speaker is to amplify sound.