Magnetic Effects Of Current Question 23
Question: If a long hollow copper pipe carries a direct current, the magnetic field associated with the current will be [CBSE PMT 1999; AFMC 1999; CPMT 1984, 2000; Pb. PET 2000; JIPMER 2002]
Options:
A) Only inside the pipe
B) Only outside the pipe
C) Neither inside nor outside the pipe
D) Both inside and outside the pipe
Show Answer
Answer:
Correct Answer: B
Solution:
Because for inside the pipe $ i=0 $
$ \therefore B=\frac{{\mu_{0}}i}{2\pi r}=0 $
BETA
