Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

AIIMS 201926 May

Exam: AIIMS
Year: 2019
Date: 26 May
Subject: Physics
Chapter: Magnetic Effects of Current

AIIMS 2019 · 26 May · Physics · Magnetic Effects of Current

The magnetic field (B) inside a long solenoid having n turns per...

The magnetic field

(B)

inside a long solenoid having

n

turns per unit length and carrying current

I

when iron core is kept in it is (

\mu_0=

permeability of vacuum,

\chi=

magnetic susceptibility)

Options

A $\mu_0 n I(1-\chi)$
B $\mu_0 n I \chi$
C $\mu_0 n I^2(1+\chi)$
D $\mu_0 n I(1+\chi)$

Correct answer

D. $\mu_0 n I(1+\chi)$

Step-by-step solution

Magnetic field inside a long solenoid with an iron core inside it is

B=\mu n I

But

\mu=\mu_0(1+\chi) \quad \therefore \quad B=\mu_0(1+\chi) n I

Practice Magnetic Effects of Current on Quantrex Academy →

More from Magnetic Effects of Current

The magnitude of the magnetic induction (B) at a point on the axis at a large distance… MHT CET Medical 2026 For a circular coil of radius a , at what distance x along its axis the magnetic field is… MHT CET Medical 2026 A circular coil having 'n' turns, each of radius 'r' carries a current 'I'. The magnetic… MHT CET Medical 2026 The ratio of cyclotron frequency f to the radius of the path of a charged particle R is… MHT CET Medical 2026 In a cyclotron, for the same values of B and R, what is the ratio of the maximum kinetic… MHT CET Medical 2026 The magnitude of the magnetic field at point O (centre of the arc) with radius R, in the… MHT CET Medical 2026 Two wires of same material A and B, having lengths l and (2l)/(3) carry the currents I… MHT CET Medical 2026 An electron is projected with uniform velocity along the axis of a current carrying long… MHT CET Medical 2026 Full Magnetic Effects of Current list All AIIMS PYQs