Magnetic Effects Of Current Question 126
Question: The field due to a long straight wire carrying a current I is proportional to [MP PMT 1993]
Options:
A) I
B) $ I^{3} $
C) $ \sqrt{I} $
D) $ 1/I $
Show Answer
Answer:
Correct Answer: A
Solution:
$ B=\frac{{\mu_{0}}}{4\pi }\cdot \frac{2i}{r} $
Þ $ B\propto i $