Question

A current I is flowing through wire PQR. This wire is bent in form of an
angle and placed is uniform magnetic field 'B' according to figure.
If PQ=( and ZPQR = 60°. The ratio of magnetic forces on PQ
to QR respectively:-​

Answer 1

Answer:

The ratio of magnetic forces on PQ to QR respectively is 2:√3

Explanation:

According to the problem the current I is  flowing through the wire PQR

Let the length of PQ= L

let the magnetic force on PQ is f1,

f1= IBL sinθ

    =ILB sin90 degree

    =ILB

let the magnetic force on QR, is f2

f2=ILBsin60 degree

=3√2ILB

Then, the ratio of magnetic forces,f1/f2=1/3√2=2/√3