Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A long Straight Metal rod has a very long hole of radius 'a' drilled parallel to the rod axis as shown in fig. If the rod carries a current <st

A long Straight Metal rod has a very long hole of radius 'a' drilled parallel to the rod axis as shown in fig. If the rod carries a current 'i'. find the value of magnetic induction on the axis of the hole, where, oc=c.

Option: 1

\frac{\mu_0ic}{\pi\left(b^2-a^2\right)}


Option: 2

\frac{\mu_0ic}{2\pi\left(b^2-a^2\right)}


Option: 3

\frac{\mu_0i(b^2-a^2)}{2\pi c}


Option: 4

\frac{\mu_0ic}{2\pi a^2 b^2}


Answers (1)

best_answer

\sigma=\frac{i}{\pi\left(b^2-a^2\right)} \\

\oint \vec{B} d i=\mu_0 i r \\

B(2 \pi c)=\frac{\mu_0 i \pi c^2}{\pi\left(b^2-a^2\right)} \\

B_1=\frac{\mu_0 i c}{2 \pi\left(b^2-a^2\right)} \\

When \sigma taken, B_2=0 

\Rightarrow B_{n e t}=B_1=\frac{\mu_0 i c}{2 \pi\left(b^2-a^2\right)}

Posted by

seema garhwal

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025: 2nd attempt? Mistakes to avoid, tips to improve score, percentile
anam-khan

JEE Main 2025: What to expect on exam day? Section-wise paper pattern, marking scheme, last-minute tips
anam-khan

JEE Main 2025 Live: NTA JEE session 2 exams from tomorrow; updates on admit card, exam pattern, passing marks

Latest Question