A straight wire of length 
metre is carrying a current of 2 A and the magnetic field due to it is measured at a point distant 1 cm from it. If the wire is to be bent into a circle and is to carry the same current as before, the ratio of the magnetic field at its center to that obtained in the first case would be
Text Solution
Verified by ExpertsThe correct answer is:
B
If a wire of length 
is bent in the form of a circle of radius 
then 
Magnetic field due to straight wire
also magnetic field due to circular loop
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
An electron is revolving round a proton, producing a magnetic field of 16 in a circular orbit of r…
A vertical wire kept in ‐X plane carries a current from Q to P (see figure). The magnetic field du…
A charge moves vertically upwards with speed , a second charge‐ moves horizontally to the right …
Along straight wire ca1Tying a current of 30A is placed in an external uniform magnetic field of in…
Along vertical wire in which a current is flowing produces a neutral point with the earth’s magneti…
Two very thin insulated metallic wires placed along X and ‐ axis carry equal currents as shown in …