5.1 e)  The earth’s field, it is claimed, roughly approximates the field due to a dipole of magnetic moment 8 \times 10 ^ { 22} J T ^{-1}located at its centre. Check the order of magnitude of this number in some way.

Answers (1)
S safeer

Magnetic field 

B=\frac{\mu_o M}{4\pi R^3}

substituting the values 

R=6.4\times10^6\ m

\mu_0=4\pi \times 10^{-7}

M=8 \times 10 ^ { 22} J T ^{-1}

then

B=0.3G

Preparation Products

JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
Buy Now
Rank Booster NEET 2021

This course will help student to be better prepared and study in the right direction for NEET..

₹ 13999/- ₹ 9999/-
Buy Now
Knockout JEE Main April 2021 (Easy Installments)

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 4999/-
Buy Now
Knockout NEET May 2021

An exhaustive E-learning program for the complete preparation of NEET..

₹ 22999/- ₹ 14999/-
Buy Now
Knockout NEET May 2022

An exhaustive E-learning program for the complete preparation of NEET..

₹ 34999/- ₹ 24999/-
Buy Now
Exams
Articles
Questions