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


7.
A square loop and a circular loop, both carrying the same current, are placed in the same magnetic field. Which has a greater magnetic dipole moment?

NEET - 2023

A.
Circular loop
B.
Square loop
C.
Both have the same
D.
Depends on the field orientation
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ANSWER :
A. Circular loop
8.
Which rule is used to determine the direction of the magnetic moment of a current loop?
A.
Right-hand thumb rule
B.
Fleming’s left-hand rule
C.
Coulomb’s law
D.
Lenz’s law
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ANSWER :
A. Right-hand thumb rule
9.
A current-carrying loop placed in a uniform magnetic field experiences:
A.
Only translational motion
B.
Only rotational motion
C.
Both rotational and translational motion
D.
No motion
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ANSWER :
C. Both rotational and translational motion
10.
The torque acting on a current loop in a uniform magnetic field is given by:
A.
τ = M × B
B.
τ = I × A
C.
τ = M × B × sinθ
D.
τ = I × B × cosθ
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ANSWER :
C. τ = M × B × sinθ
11.
A current loop placed in a uniform magnetic field will have maximum torque when:
A.
It is perpendicular to the field
B.
It is parallel to the field
C.
It is at 45° to the field
D.
It is at 60° to the field
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ANSWER :
B. It is parallel to the field
12.
A rectangular loop of area 0.02 m² carries a current of 5 A. The magnetic moment of the loop is:
A.
0.1 A.m²
B.
0.5 A.m²
C.
0.05 A.m²
D.
0.2 A.m²
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ANSWER :
D. 0.2 A.m²