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.
The work done to rotate a magnetic dipole from angle θ₁ to θ₂ in a uniform magnetic field B is:
A.
mB(θ₂ - θ₁)
B.
mB(cos θ₁ - cos θ₂)
C.
mB(cos θ₂ - cos θ₁)
D.
mB(sin θ₂ - sin θ₁)
😑 View Answer Rough Work Error
ANSWER :
B. mB(cos θ₁ - cos θ₂)
14.
A current loop of area 2 × 10⁻² m² carries current 5 A. Its magnetic moment is:
A.
0.1 A·m²
B.
1 A·m²
C.
0.01 A·m²
D.
10 A·m²
😑 View Answer Rough Work Error
ANSWER :
A. 0.1 A·m²
15.
On its axis, at large distances, the magnetic field of a current loop is similar to that of:
A.
Electric dipole
B.
Long straight wire
C.
Point charge
D.
Infinite sheet
😑 View Answer Rough Work Error
ANSWER :
A. Electric dipole
16.
The axial magnetic field of a current loop at large distance x (x >> R) is:
A.
B = (μ₀/4π)(2m/x³)
B.
B = (μ₀/4π)(m/x²)
C.
B = (μ₀/2π)(m/x³)
D.
B = (μ₀/4π)(m/x³)
😑 View Answer Rough Work Error
ANSWER :
A. B = (μ₀/4π)(2m/x³)
17.
The magnetic field at a point on the equatorial (perpendicular) plane of a dipole at distance x (x >> R) is:
A.
B = (μ₀/4π)(m/x³)
B.
B = (μ₀/2π)(m/x³)
C.
Zero
D.
B = (μ₀/4π)(2m/x³)
😑 View Answer Rough Work Error
ANSWER :
A. B = (μ₀/4π)(m/x³)
18.
Magnetic dipole moment is a:
A.
Tensor quantity
B.
Scalar quantity
C.
Vector quantity
D.
Constant number
😑 View Answer Rough Work Error
ANSWER :
C. Vector quantity