JEE Mains Model Paper 4

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Question : 50 of 90
 
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For an L-C-R circuit, the power transferred from the driving source to the driven oscillator is P = I2cosϕ
a) Here, the power factor cos ϕ > 0, P ≥ 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 < 0) the energy out of oscillator
d) The driving force can take away energy out of the oscillator, then
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