Student Login

Home›Chapters›Electromagnetic Induction PYQs›Self-Inductance & Energy›Question 87

NEET 1991 (AIPMT) · Self-Inductance & Energy

Self-Inductance & Energy question from NEET 1991 (AIPMT)

Q87NEET 1991 · AIPMTEasy

Self-Inductance & Energy

If the number of turns per unit length of a coil of solenoid is doubled, the self-inductance of the solenoid will

Show answer and solution

Answer: (d)

$L = \mu_0 n^2 A l \propto n^2$ .
$n' = 2n \Rightarrow L' = 4L$
So the answer is (d) become four times.

Report a mistake

More questions on Self-Inductance & Energy

A 100 millihenry coil carries a current of 1 A. Energy stored in its magnetic field isNEET 1991 (AIPMT)
The current in self inductance L = 40 mH is to be increased uniformly from 1 amp to 11…NEET 1990 (AIPMT)
An inductor may store energy inNEET 1990 (AIPMT)
Energy in a current carrying coil is stored in the form ofNEET 1989 (AIPMT)
The current flowing through an inductor of self-inductance L is continuously increasing…MHT CET 2026 (20 May, Shift 1)
Two coils A and B have 180 and 360 turns respectively. The current of 1A flows through…MHT CET 2026 (18 Apr, Shift 2)
A graph of magnetic flux ( Φ) versus current (I) is shown for four inductors A, B, C, D…MHT CET 2026 (16 Apr, Shift 2)
The current flowing through the inductor of self inductance 'L' is continuously…MHT CET 2026 (13 Apr, Shift 1)