NEET2009PhysicsAlternating CurrentActual
Power dissipated in an LCR series circuit connected to an a.c. source of emf is :
Options
- A^2 R / R^2+ (L - 1 C )^2
- B^2 R / [ R ^2+ ( L - 1 C )^2 ]
- C^2 [ R ^2+ ( L - 1 C )^2 ] / R
- D^2 [ R ^2+ ( L - 1 C )^2 ] R
Correct answer
B. ^2 R / [ R ^2+ ( L - 1 C )^2 ]
Step-by-step solution
aligned P _ av & = E _ rms I _ rms & = z R Z = ^2 R z ^2 & = ^2 R R ^2+ ( L - 1 C )^2 aligned