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(D) The power transmitted in an $AC$ circuit is given by $P = V_{rms} I_{rms} \cos \phi$,where $\cos \phi$ is the power factor.From this,the current i

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large power loss in transmission.

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(D) The power transmitted in an $AC$ circuit is given by $P = V_{rms} I_{rms} \cos \phi$,where $\cos \phi$ is the power factor.From this,the current is $I_{rms} = \frac{P}{V_{rms} \cos \phi}$.For a fixed power $P$ and voltage $V_{rms}$,if the power factor $\cos \phi$ is low,the current $I_{rms}$ must be large to transmit the same amount of power.The power loss in the transmission lines is given by $P_{loss} = I_{rms}^2 R$.Since $I_{rms}$ is large,the power loss $I_{rms}^2 R$ will be large.Therefore,a low power factor implies a large power loss in transmission.

For circuits used for transporting electric power,a low power factor implies . . . . . . .

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