NEETPhysicsAlternating Current
Given below are two statements: Statement I : An AC circuit undergoes electrical resonance if it contains either a capacitor or an inductor. Statement II: An AC circuit containing a pure capacitor or a pure inductor consumes high power due to its non-zero power factor. In the light of above statements, choose the correct answer from the options given below:
Options
- AStatement I is false but statement II is true
- BStatement I is true but statement II is false
- CBoth Statement I and Statement II are false
- DBoth Statement I and Statement II are true
Correct answer
C. Both Statement I and Statement II are false
Step-by-step solution
For resonance to occur the condition is X L = X C . So, both inductor and capacitor is required. The power factor is given by cos ϕ . For an inductor the power factor is zero-lagging, cos 90 ° = 0 . The angle between the voltage and current is 90 ° . For a capacitor the power factor is zero-leading. Hence, both statements are false.