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Give any one definition of power factor.

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प्रश्न

Give any one definition of power factor.

परिभाषा
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उत्तर

The Power Factor is the ratio of True Power (measured in Watts) to Apparent Power (measured in Volt-Amperes) in an AC circuit.

Power factor (cos Φ) = `"True power"/"Apparent power"`

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अध्याय 4: Electromagnetic Induction And Alternating Current - Evaluation [पृष्ठ २६०]

APPEARS IN

सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 12 TN Board
अध्याय 4 Electromagnetic Induction And Alternating Current
Evaluation | Q II. 20. | पृष्ठ २६०

संबंधित प्रश्न

A resistor of 500 Ω and an inductance of 0.5 H are in series with an AC source which is given by V = `100 sqrt2` sin (1000 t). The power factor of the combination is ______.


In a series LCR circuit, the phase difference between the voltage and the current is 45°. Then the power factor will be ______.


When an AC source is connected to an ideal inductor show that the average power supplied by the source over a complete cycle is zero.


Prove that an ideal capacitor in an AC circuit does not dissipate power


(a) An emf e = e0 sin ωt applied to a series L - C - R circuit derives a current I = I0sinωt in the circuit. Deduce the expression for the average power dissipated in the circuit.
(b) For circuits used for transporting electric power, a low power factor implies large power loss in transmission. Explain.


A 25 μF capacitor, a 0.10 H inductor, and a 25Ω resistor are connected in series with an AC source whose emf is given by e = 310 sin 314 t (volt). What is the frequency, reactance, impedance, current, and phase angle of the circuit?


In series LCR circuit, resistance is 18 `Omega` and impedance is 33 `Omega`. An r.m.s. voltage of 220 V is applied across the circuit. The true power consumed in a.c. circuit is ____________.


In LCR series circuit, an alternating e.m.f. 'e' and current 'i' are given by the equations e = 100 sin (100 t) volt,

`"i" = 100  "sin" (100"t" + pi/3)"mA"`.

The average power dissipated in the circuit will be ____________.


The effective capacitor between A and B in the following circuit is ______.


Where is the power dissipated in an alternating current circuit?


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