KVPY SX SB Exam 2012 Question Paper

Question : 27 of 120

Marks: +1, -0

A loop carrying current I has the shape of a regular polygon of n sides. If R is the distance from the centre to any vertex, then the magnitude of the magnetic induction vector

B↖{→}

at the centre of the loop is

$n{µ_0I}/{2πR}\tanπ/n$
${µ_0I}/{2R}$
$n{µ_0I}/{2πR}\tan {2π}/n$
${µ_0I}/{πR}\tanπ/n$

Validate

Solution:

B_\net = n × B_1

=n.µ_0/{4π}.I/{R\cos π/n}2\sin π/n

Go to Question:

Prev Question

Next Question