JEE PHYSICS MCQ: MAGNETISM AND MATTER

1 Medium

1 of 1

Application +4 | -1

The core of a toroid having 3000 turns has inner and outer radii of

11 \mathrm{~cm}

and

12 \mathrm{~cm}

respectively. The magnetic field in the core for a current of

0.70 \mathrm{~A}

2.5 \mathrm{~T}

. What is the relative permeability of the core?

View answer and explanation

Correct option: A

684.4

Option A (684.4) is correct because it is the relative permeability calculated using the given magnetic field, number of turns, current, and radii of the toroid.

More Questions from MAGNETISM AND MATTER

Practice All Chapter MCQs →

Curie temperature is the one above which A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is

{2^{5/4}}

s. One of the magnets is removed and if the other magnet oscillates in the same field , then the time period in second is The relative permeability of a substance

X

is slightly less than unity and that of substance

Y

is slightly more than unity, then A bar magnet is equivalent to If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by

\mu_{\mathrm{d}}, \mu_{\mathrm{p}}

and

\mu_{\mathrm{f}}

respectively, then :- Which of the following is most suitable for the core of electromagnets