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For an LCR circuit, the power transferre...

For an LCR circuit, the power transferred from the driving source to the driven oscillator is `P=I^2Zcosphi` _____

A

Here, the power factor cos `phi gt 0 , P gt 0`

B

The driving force can give no energy to the oscillator (P = 0) in some cases.

C

The driving force cannot syphon out (P `lt` 0) the energy out of oscillator.

D

The driving force can take away energy out of the oscillator.

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
Power `P=I^2Z cos phi`
where I=current , Z=impedance , cos `phi`=power factor
but cos `phi=R/2`
where R `gt` 0 and hence `Z gt 0`
`therefore cos phi gt 0`
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