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Why a coil of wire placaed in series circuit allows low frequency current but not high frequency current to pass?
Wiki User
∙ 13y ago
The opposition to an alternating current offered by a coil, or inductor, is called impedance (symbol Z, measured in ohms) which, in turn, is made up of two components: resistance (symbol R) and inductive reactance (symbol XL). These three quantities are related as follows: Z2 = R2 + XL2.
The resistance of an inductor is a fixed value which depends upon the length of the coil's wire, the cross-sectional area of the wire, and the resistivity of the material from which the wire is made.
The inductive reactance of an inductor, on the other hand is directly proportional to the frequency of the supply. So, at high frequencies, an inductor's inductive reactance is very much higher than at low frequencies.
So, at high frequencies, the impedance of the inductor is higher because its inductive reactance is higher.
The current flowing through a coil is, by Ohm's Law: I = V / Z. So, at high frequencies, the inductor's impedance will be much higher than at low frequencies, which means that a very much smaller current will flow when the frequency is high compare to when the frequency is low.
Wiki User
∙ 13y ago
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Any complete circuit. ==== An electrical circuit.
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It is series circuit
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Series circuit.
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"short circuit"
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series circuit
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A series circuit.
What is the part of a circuit that connects or disconnects the circuit?
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