Magnetic Effects Of Current Question 48
Question: A long solenoid has a radius a and number of turns per unit length is n. If it carries a current i, then the magnetic field on its axis is directly proportional to [MP PMT 1994]
Options:
A) ani
B) ni
C) $ \frac{ni}{a} $
D) $ n^{2}i $
Show Answer
Answer:
Correct Answer: B
Solution:
Because $ B={\mu_{0}}ni $
Þ $ B\propto ni $ .
BETA
