Story
NEET AITS
Story
Mock Tests
Story
Live Class
Story
JEE AITS

Questions  

A long straight wire of radius a  carries a steady current I  The current is uniformly distributed over its cross-section. The ratio of the magnetic fields B  and B', at radial distances a2 and 2a respectively, from the axis of the wire is

Unlock the full solution & master the concept.

Get a detailed solution and exclusive access to our masterclass to ensure you never miss a concept
By Expert Faculty of Sri Chaitanya
a
1
b
4
c
14
d
12

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is A

Magnetic field at a point inside the wire at distance r=a2 from the axis of wire is B=μ0I2πa2r=μ0I2πa2×a2=μ0I4πaMagnetic field at a point outside the wire at distance r(=2 a) from the axis of wire isB'=μ0I2πr=μ0I2π×12a=μ0I4πa  ∴ BB'=1
ctaimg

ctaimg

Similar Questions

Four long insulated current carrying wires, cross each other as shown in the figure. If the separation between any pair of parallel wires is d, the magnetic induction at O is

Want to Improve your productivity
talk to our academic experts now !!

counselling
india
+91

whats app icon