Banner 0
Banner 1
Banner 2
Banner 3
Banner 4
Banner 5
Banner 6
Banner 7
Banner 8

Q.

A long straight metal rod has a very long hole of radius ‘a ’ drilled parallel to the rod  carries a current i . Find the magnetic field on axis of hole. Given C  is the center of the hole and  OC=c

Question Image

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya

a

μ0ic2πb2

b

μ0ib2a22πc

c

μ0icπb2a2

d

μ0ic2πb2a2

answer is B.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

Detailed Solution

detailed_solution_thumbnail

In the rod current density.

j=iπ(b2a2)

Question Image

Actual field is the vector sum of two current carrying rods, having same current density but in opposite direction. On the hole axis, only the larger rod contributes magnetic field.
Imagine an ampere a loop of radius E and apply Ampere law.
B.dl=μ0ienclosedB2πc=μ0jπc2or B=μ0iπc22πcπb2a2=μ0ic2πb2a2or B=μ0ic2πb2a2Hence option a is correct.

Watch 3-min video & get full concept clarity

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon