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JEE Main Physics Class 12 Moving Charges and Magnetism Part 1 Questions
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© examsnet.com
Question : 14
Total: 100
A rectangular coil (Dimension 5 cm × 2.5 cm) with 100 turns, carrying a current of 3 A in the clock-wise direction, is kept centered at the origin and in the X-Z plane. A magnetic field of 1 T is applied along X-axis. If the coil is tilted through 45° about Z-axis, then the torque on the coil is:
[9 April 2019 I]
0.38 Nm
0.55 Nm
0.42 Nm
0.27 Nm
Validate
Solution:
τ
=
M
B
sin
45
°
=
N
(
iA
)
B
sin
45
°
=
100
×
3
(
5
×
2.5
)
×
10
−
4
×
1
×
1
√
2
=
0.27
N
−
m
© examsnet.com
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