A rigid rectangular loop, with sides PQ = RS = a = 20 cm and QR = SP = b = 10 cm, has a mass per unit of length = 5-10-2g/cm and is crossed by a current i. It can rotate without friction around PQ which is parallel to the horizontal x axis. When a uniform and vertical magnetic field acts on the loop B = Bu₂ with B = 2-10-2T, it rotates by an angle 0 = 30° Calculate the value of the current i and the work W done by the field on the loop during the rotation. R B
A rigid rectangular loop, with sides PQ = RS = a = 20 cm and QR = SP = b = 10 cm, has a mass per unit of length = 5-10-2g/cm and is crossed by a current i. It can rotate without friction around PQ which is parallel to the horizontal x axis. When a uniform and vertical magnetic field acts on the loop B = Bu₂ with B = 2-10-2T, it rotates by an angle 0 = 30° Calculate the value of the current i and the work W done by the field on the loop during the rotation. R B
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Transcribed Image Text:A rigid rectangular loop, with sides PQ =
20 cm and QR = SP = b =
RS=
= a =
10 cm, has a mass per unit of length 8 =
5-10-2g/cm and is crossed by a current i.
It can rotate without friction around PQ
which is parallel to the horizontal x axis.
When a uniform and vertical magnetic
field acts on the loop B = Bu₂ with B =
2-10-2T, it rotates by an angle 0 = 30°
Calculate the value of the current i and
the work W done by the field on the loop
during the rotation.
R
B
A
P
29/31
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