In a capacitance dominated RLC circuit
In a series RLC circuit there becomes a frequency point were the inductive reactance of the inductor becomes equal in value to the capacitive reactance of the capacitor. In other words, XL = XC.
Series Resonance circuits are one of the most important circuits used electrical and electronic circuits.
Phase angle between voltage and current in RLC circuit is given by
Answer :- d
Solution :- From the phasor diagram, the value of phase angle will be
tan ϕ = [V(L) - V(c)]/V(R)
tan ϕ = [X(L) - X(C)]/R
ϕ = tan^(-1) [X(L) - X(C)]/R
A 1.0 mH inductance, a10μF capacitance and a 5.0 ohm resistance are connected series to an a.c. source. It is found that inductor and the capacitor show equal reactance. The reactance should be nearest to:
From the formula we get,
We also know that,
In which of the following cases the power factor is not equal to 1
What is the inductance of a choke required for a lamp running at 60 volt d.c consuming 5 A current connected to 110 volt, 50 Hz ac mains?
Ac and dc both can be measured by
Hotwire instruments are based on the heat Irms2Rt and/or power Irms2R producing property of current. Hence it can measure both ac and dc current as both produce heat when passed through a conductor.
What is the value of power factor in RLC circuit
In a series LCR what will be phase difference between voltage drop across inductor and capacitor
Let’s keep this simple and to the point. We know that:
1.in a series circuit the same current flows through each component
2.the voltage across an ideal inductor L is 90˚ ahead of an AC current through it
3.the voltage across an ideal capacitor C is 90˚ behind an AC current through it
So putting these facts together we can conclude that given an AC series current the voltages across any L and C must have a phase difference of 180˚
A resistance of 5 ohm and an inductance of 50 mH are connected in series with an a. c. I = 100 sin (100 t). What is the phase difference between the instantaneous current and voltage?
Cosφ=R/Z=R/√R2/ ω2L2=5/√(25+(50)2x (0.1)2)
Admittance is reciprocal of
In electrical engineering, admittance is a measure of how easily a circuit or device will allow a current to flow. It is defined as the reciprocal of impedance, analogous to how conductance & resistance are defined. The SI unit of admittance is the siemens (symbol S); the older, synonymous unit is mho, and its symbol is ℧ (an upside-down uppercase omega Ω). Oliver Heaviside coined the term admittance in December 1887.
Admittance is defined as
Y is the admittance, measured in siemens
Z is the impedance, measured in ohms