Saved Bookmarks
| 1. |
In which of the following circuits the maximum power dissipation is observed? (a) Pure capacitive circuit (b) Pure inductive circuit (c) Pure resistive circuit (d) None of these |
|
Answer» tion:In an AC circuit, the POWER dissipated in the circuit is given by:P=V rms I rms cosϕThe ϕ is the phase DIFFERENT between the current and the volatge.In the purely resistive and capacitive circuits, the phase difference is 90 ∘ , so the power dissipated will be zero.But in a purely resistive circuit, the VOLTAGE and current are in same phase so phase difference is zero. Therefore, it will have maximum power dissipation as cosϕ=1 in this case. |
|