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COMEDK2024Evening ShiftPhysicsAlternating CurrentActual

When an A.C. source is connected to a inductive circuit,

Options

  1. Avoltage and current are in same phase.
  2. Bvoltage lags behind current in phase.
  3. Cthe phase between voltage and current depends upon the value of inductance
  4. Dvoltage is ahead of current in phase.

Correct answer

D. voltage is ahead of current in phase.

Step-by-step solution

In a purely inductive circuit, the voltage V across the inductor is given by V = L di dt . If the current is i = I₀ ( t) , then the voltage is V = L d dt (I₀ ( t)) = L I₀ ( t) = V₀ ( t + 2 ) . Comparing the phases, the voltage leads the current by a phase angle of 2 . Therefore, the voltage is ahead of the current in phase. Answer: voltage is ahead of current in phase.

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