(a) 15 A.
(b) 2 A.
(c) Zero A.
(d) none of the above.
Answer: (b) 2 A.
Explanation:
CONCEPT: Inductor in DC Circuit
In a DC circuit:
At Switching ON (Transient State)
- Inductor
opposes change in current
- Inductance
is important
At Steady State (After Long Time)
- Current
becomes constant
- Inductor
behaves like a short circuit
- Inductive
reactance becomes zero
So, only resistance controls current.
IMPORTANT RULE ⭐
At steady state in DC:
GIVEN DATA
STEP: Calculate Steady-State Current
Using Ohm’s Law:
RESULT
Correct Answer
✅ Option (b) 2 A
Why Inductance Is Not Used Here
- Inductance
affects only how fast current rises
- It
does NOT affect final current value
- After
long time, inductor has no effect in DC
ONE-LINE EXAM POINT ⭐
In a DC circuit at steady state, an inductor behaves like a
short circuit and current is given by 
.
FINAL CONCLUSION
Since the circuit is supplied with DC, after steady state is
reached, the inductor offers no opposition. The current depends only on
resistance. Therefore, the steady-state current is 2 A.