Magnetic Effects Of Current Question 29
Question: A straight section PQ of a circuit lies along the X-axis from $ x=-\frac{a}{2} $ to $ x=\frac{a}{2} $ and carries a steady current i. The magnetic field due to the section PQ at a point X = + a will be [MP PMT 1987]
Options:
A) Proportional to a
B) Proportional to $ a^{2} $
C) Proportional to $ 1/a $
D) Zero
Show Answer
Answer:
Correct Answer: D
Solution:
Magnetic field at a point on the axis of a current carrying wire is always zero.
BETA
