Student Login

Home›Chapters›Electromagnetic Induction PYQs›Self-Inductance & Energy›Question 45

MHT CET 2024 (16 May, Shift 2) · Self-Inductance & Energy

Self-Inductance & Energy question from MHT CET 2024 (16 May, Shift 2)

Q45MHT CET 2024 · 16 MAY · SHIFT 2Medium

Self-Inductance & Energy

A coil is wound on a core of rectangular crosssection. If all the linear dimensions of the core are increased by a factor 2 and number of turns per unit length of coil remains same, the self inductance increases by a factor of (Assume, permeability is same)

Show answer and solution

Answer: (b)

$L = \mu_0 n^2 A l$ with $n$ fixed, so $L \propto A l \propto (\text{linear size})^3$ .
Factor $= 2^3 = 8$
So the answer is (b) 8.

Report a mistake

More questions on Self-Inductance & Energy

An air cored coil has a self inductance 0.1 H. A soft iron core of relative permeability…MHT CET 2024 (15 May, Shift 2)
Two solenoids of equal number of turns have their lengths as well as radii in the same…MHT CET 2024 (15 May, Shift 1)
A closely wound coil of 100 turns and of cross-section 1 cm² has coefficient of self…MHT CET 2024 (11 May, Shift 2)
An air cored coil has self inductance of 0.1 H. A soft iron core of relative permeability…MHT CET 2024 (2 May, Shift 2)
Let us consider two solenoids A and B, made from same magnetic material of relative…NEET 2024
A long solenoid has 1500 turns. When a current of 3.5 A flows through it, the magnetic…MHT CET 2023 (14 May, Shift 2)
SI units of self inductance isMHT CET 2023 (12 May, Shift 2)
When a current of 1 A is passed through a coil of 100 turns, the flux associated with it…MHT CET 2023 (11 May, Shift 1)