What is power factor and voltage-current relationship in an $AC$ circuit?
- APower factor is $\cos \phi$,where $\phi$ is the phase difference between voltage and current.
- BPower factor is $\sin \phi$,where $\phi$ is the phase difference between voltage and current.
- CPower factor is $\tan \phi$,where $\phi$ is the phase difference between voltage and current.
- DPower factor is $\cot \phi$,where $\phi$ is the phase difference between voltage and current.
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