5. A primary solenoid connected to a battery is inside a secondary solenoid.
Which of the following explain why it is not possible to induce a current into
the secondary coil?
A. the primary current is off.
B. No movement of a core into the primary coil
C. The primary pulling out of the secondary coil
D. It is a direct/steady current through the primary coil
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Answer:
D
Explanation:
it is direct or steady current through the primary coil