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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACQuality and Power factorMedium2 minPYQ_2016

PhysicsMediumsingle choice

The potential differences across the resistance, capacitance, and inductance are $80 V, 40 V$ and $100 V$ , respectively in an LCR circuit. The power factor of this circuit isNEET 2016 (Phase 2)

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Answer:

Solution:

$P_{ac} = V_{rms} I_{rms} \cos (ϕ)$ ,

where, $\cos (ϕ)$ is the power factor.

$cosϕ = \frac{R}{z} = \frac{V_{R}}{V} = \frac{80}{\sqrt{80^{2} + {(100 - 40)}^{2}}}$

$= \frac{80}{100} = 0.8$ .

where, $Z$ is the impedence of the circuit.

Stream:NEETSubject:PhysicsTopic:EMI/ACSubtopic:Quality and Power factor

⏱ 2mℹ️ Source: PYQ_2016

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