1. Tardigrade
  2. Question
  3. Physics
  4. A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of magnetic field will be equal to

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A long solenoid carrying a current produces a magnetic field $B$ along its axis. If the current is doubled and the number of turns per $cm$ is halved, the new value of magnetic field will be equal to

JEE MainJEE Main 2022Magnetism and Matter

Solution:

$B _{1}=\mu_{0} nI$
$B _{2}=\mu_{0}\left(\frac{ n }{2}\right)(2 I )$
$\Rightarrow B _{1}= B _{2}$