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If in circular coil of radius R, current...

If in circular coil of radius `R`, current `I` is flowing and in another coil `B` of radius `2R` a current `2I` is flowing , then the raatio of the magnetic fields `B_(A) and B_(B)`, produced by them will be

A

1

B

2

C

`1//2`

D

4

Text Solution

Verified by Experts

The correct Answer is:
A
In coil , `A,B =(mu_0)/(4pi) (2piI)/(R) :.B prop I/R` ,
Hence , `B_1/B_2=I_1/R_1.R_2/I_2=2/2=1`
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DISHA PUBLICATION-MOVING CHARGES AND MAGNETISM -EXERCISE - 1 : Concept Builder (Topic wise) (Topic 2 : Magnetic Field Lines, Biot - Savart.s Law and Ampere.s Circuital Law
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