MCQ
To maintain a steady current through the conductor, some external device must do work. What does the external device provide?
- AInductance
- BCapacitance
- CPotential difference
- ✓Electromotive force
✓
Answer
Correct option: D.
Electromotive force
To maintain steady current through the conductor, electromotive force must be provided by the external device to take positive charge from lower potential to higher potential i.e. in the direction opposite to that of the electric field.
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