Torque on a Magnetic Dipole in a Uniform Magnetic Field NEET Questions

Physics - Magnetic Effects of Current and Magnetism

Torque on a Magnetic Dipole in a Uniform Magnetic Field MCQ Questions


1.
The torque on a magnetic dipole in a uniform magnetic field is given by which formula?
A.
τ = MB
B.
τ = MB cosθ
C.
τ = MB sinθ
D.
τ = MB tanθ
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ANSWER :
C. τ = MB sinθ
2.
The torque on a magnetic dipole in a uniform magnetic field is maximum when the angle between the dipole moment and the field is:
A.
0°
B.
45°
C.
90°
D.
180°
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ANSWER :
C. 90°
3.
If a magnetic dipole is aligned along the direction of the uniform magnetic field, the torque acting on it is:
A.
Zero
B.
Maximum
C.
Minimum
D.
Infinite
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ANSWER :
A. Zero
4.
What is the SI unit of torque on a magnetic dipole?
A.
Joule
B.
Weber
C.
N·m
D.
T·m²
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ANSWER :
C. N·m
5.
A magnetic dipole with a moment of 2 A·m² is placed in a uniform magnetic field of 0.5 T at an angle of 60°. The torque acting on it is:
A.
1 N·m
B.
0.5 N·m
C.
0.866 N·m
D.
2 N·m
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ANSWER :
C. 0.866 N·m
6.
If the angle between the magnetic moment and the field increases, the torque acting on the dipole:
A.
Decreases
B.
Increases
C.
Remains constant
D.
Becomes zero
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ANSWER :
B. Increases