Question

For an LCR circuit, the power transferred from the driving source to the driven oscillator is $P = I ^ { 2 } Z \cos \phi \cdot$ Than

• A. The power factor cos
• B. The driving force can given no energy to the oscillator (P=0) in some cases
• C. The driving force cannot siphon out (P<0) the energy out of oscillator.
• D. All of these

Answer 1

Answer: (D)

All of these

Answer 2

: Here, ,

(1) If power factor cos ,$\phi \geq 0 \Rightarrow P \geq 0$

(2) For wattles component the driving force shall give no energy to the oscillator. So, at P = 0.

(3) The driving force cannot siphon out the energy out of osxillator. i.e., P cannot negative. Hence all option are correct.