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The hindrance offered by inductance or capacitance or both to the flow of ac in an ac circuit is called reactance and is denoted by X. Thus when there is no ohmic resistance in the circuit, the reactance is equal to impedance.
26 maj 2019 · The hindrance offered by inductance or capacitance or both to the flow of ac in an ac circuit is called reactance and is denoted by X. Thus when there is no ohmic resistance in the circuit, the reactance is equal to impedance.
Alternating Current: Alternating current is defined as electric current which periodically reverses direction and changes its magnitude continuously. Variation of current with time for four types of generators are shown in the figures. TWhich amongst them can be called AC? Solution : •Alternating Current periodically changes its direction.
Alternating current is a current that changes its magnitude and polarity at regular interval of time. If the current maintains its direction constant it is called direct current. Download Complete Chapter Notes of Alternating Current. Download Now. AC voltage, v = V 0 sinωt. AC current, i = I 0 sinωt. Capacitive Reactance V 0 /I 0 = 1/ωC = X c.
On integrating the above equation we get, Current (I) = ) I = Hence I = I m sin ( t - /2) where I m = ( V m / L) Here Z L represents the non-resistive opposition offered by the inductor to the flow of current in an ac circuit. It is called inductive reactance (X L) i.e., X L = L
Alternating Current - Comprehensive NEET Physics Notes 1. Key Formulae Extraction: Ohm’s Law for AC Circuits: V m = I m R; RMS Values:
AC Circuit. For pure resistance: The voltage and the current are in same phase. e. phase difference = 0. For pure inductance: The voltage is ahead of current by π/2 i.e. phase. difference = +π/2. For pure capacitance: The voltage lags behind the current by π/2 i.e. phase difference = -π/2.
