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Electronics - Inductors - Discussion

Discussion Forum : Inductors - General Questions (Q.No. 27)
Inductors
27.
Current will cause a magnetic field in a conductor as follows:
An ac current causes a fixed polarity magnetic field.
A dc current causes a fixed polarity magnetic field.
A dc current causes an alternating magnetic field.
An ac current causes a fixed polarity magnetic field and a dc current causes an alternating magnetic field.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.
Aman said:   5 years ago
The difference between the fields produced by an AC or a DC is that the magnetic fields produced by an alternating current is a changing magnetic field (Its direction and magnitude changes with time), while for a DC the field is constant both in magnitude and direction.
Mariam said:   9 years ago
I can't understand why we chose B. Please explain.
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