Single Answer MCQ
Q-00019577
How does the direction of the magnetic field around a straight wire change when the current direction is reversed?
1
It remains the same
2
It changes to the opposite direction
3
It becomes weaker
4
It disappears completely
Answer and Solution
Answer
B. It changes to the opposite direction
Solution:
Reversing the current direction changes the direction of the magnetic field around the wire to the opposite direction. Other statements do not reflect the effects of current on magnetic fields.
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