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Alternating Current — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsAlternating Current1 Mark
MCQ
Choose the wrong statement of the following:
  • A
    The peak voltage across the inductor can be less than the peak voltage of the source in an LCR circuit
  • B
    In a circuit containing and a capacitor and an ac source the current is zero at the instant source voltage is maximum
  • C
    When an AC source is connected to a capacitor, then the rms current in the circuit gets increased if a dielectric slab is inserted into the capacitor
  • D
    In a pure inductive circuit emf will be in phase with the current
✓

Answer

  1. In a pure inductive circuit emf will be in phase with the current

Explanation:

In pure inductive circuit, 

voltage leads by $\frac{\pi}{2}$ 

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