Current Loop as a Magnetic Dipole and its Magnetic Dipole Moment NEET Questions

Physics - Magnetic Effects of Current and Magnetism

Current Loop as a Magnetic Dipole and its Magnetic Dipole Moment MCQ Questions


13.
If the magnetic moment of a circular loop is M, and the current in the loop is halved, the new magnetic moment is:
A.
M/2
B.
M/4
C.
M
D.
2M
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ANSWER :
A. M/2
14.
The work done in rotating a current loop by 180° in a uniform magnetic field is given by:
A.
M × B
B.
2M × B
C.
M × B × sinθ
D.
Zero
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ANSWER :
C. M × B × sinθ
15.
When a current-carrying coil is placed in a uniform magnetic field, it experiences a torque. The torque is maximum when

NEET - 2019

A.
The plane of the coil is parallel to the field
B.
The plane of the coil is perpendicular to the field
C.
The coil is rotated at an angle of 45°
D.
The coil is not in the field
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ANSWER :
A. The plane of the coil is parallel to the field
16.
A current loop with a smaller area and higher current will have:
A.
Higher magnetic moment
B.
Lower magnetic moment
C.
Same magnetic moment
D.
No magnetic moment
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ANSWER :
A. Higher magnetic moment
17.
A current-carrying loop behaves as a magnetic dipole because it has

NEET - 2015

A.
A definite electric field
B.
A net charge
C.
A torque in an external magnetic field
D.
A uniform current distribution
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ANSWER :
C. A torque in an external magnetic field
18.
What happens to the magnetic moment of a current loop if the current is doubled?
A.
Doubles
B.
Halves
C.
Becomes zero
D.
Remains the same
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ANSWER :
A. Doubles