JEE PYQ: Magnetic Effects Of Current Question 3
Question 3 - 2021 (17 Mar 2021 Shift 1)
A solenoid of 1000 turns per metre has a core with relative permeability 500. Insulated windings of the solenoid carry an electric current of $5$ A. The magnetic flux density produced by the solenoid is: (permeability of free space $= 4\pi \times 10^{-7}$ H/m)
(1) $\pi$ T
(2) $2 \times 10^{-3} \pi$ T
(3) $\frac{\pi}{5}$ T
(4) $10^{-4} \pi$ T
Show Answer
Answer: (1) $\pi$ T
Solution
$B = \mu n I = \mu_0 \mu_r n I = 4\pi \times 10^{-7} \times 500 \times 1000 \times 5 = \pi$ Tesla.
BETA
