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When a DC source is switched is purely inductive, the current response is

  • When a DC source is switched is purely inductive, the current response is increase exponentially and reach a constant value.
  • Initially, when the DC source is switched on, the inductor opposes the change in current and the current in the circuit starts at zero.
  • As time progresses, the inductor generates an induced voltage that increases the rate of change of current.
  • The rate of change of current is proportional to the applied voltage and inversely proportional to the inductance of the circuit.
  • The current increases at a constant rate until it reaches a steady state value determined by the applied voltage and the inductance of the circuit.
  • When the steady state is reached, the inductor behaves like a short circuit and the current is maximum.