Self inductance of a long solenoid is given by L=lμ0N2A Magnetic field at the centre of solenoid B=lμ0NI So both the statements are correct and statement 2 is correct explanation of statement 1
JEE Main 2012 — Physics Electromagnetism
This question has Statement 1 and Statement 2. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement 1: Self inductance of a long solenoid of length L, total number of turns N and radius r is less than Lπμ0N2r2. Statement 2: The magnetic induction in the solenoid in Statement 1 carrying current I is Lμ0NI in the middle of the solenoid but becomes less as we move towards its ends.
Held on 19 May 2012 · Verified 6 Jul 2026.
Statement 1 is true, Statement 2 is false.
Statement 1 is true, Statement 2 is true, Statement 2 is the correct explanation of Statement 1.
Statement 1 is false, Statement 2 is true.
Statement 1 is true, Statement 2 is true, Statement 2 is not the correct explanation of Statement 1.
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