Magnetic Effects Of Current Question 3
Question 3 - 24 January - Shift 2
A long solenoid is formed by winding 70 turns $cm^{-1}$.
If 2.0 A current flows, then the magnetic field
produced inside the solenoid is
$(\mu_0=4 \pi \times 10^{-7} TmA^{-1})$
(1) $1232 \times 10^{-4} T$
(2) $176 \times 10^{-4} T$
(3) $352 \times 10^{-4} T$
(4) $88 \times 10^{-4} T$
Show Answer
Answer: (2)
Solution:
Formula: Magnetic field due to solenoid
$B=\mu_0 nI$
$=4 \pi \times 10^{-7} \times 70 \times 10^{2} \times 2$
$=56 \pi \times 10^{-4} T$
$=176 \times 10^{-4} T$
