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.
The torque on a magnetic dipole of moment m in a magnetic field B is:
A.
τ = mB²
B.
τ = m + B
C.
τ = m × B
D.
τ = m · B
😑 View Answer Rough Work Error
ANSWER :
C. τ = m × B
8.
The torque on a current loop is maximum when the angle between m and B is:
A.
45°
B.
180°
C.
0°
D.
90°
😑 View Answer Rough Work Error
ANSWER :
D. 90°
9.
The torque on a current loop is zero when:
A.
B is maximum
B.
Current is maximum
C.
m is perpendicular to B
D.
m is parallel or antiparallel to B
😑 View Answer Rough Work Error
ANSWER :
D. m is parallel or antiparallel to B
10.
A bar magnet of magnetic moment m is placed in a uniform magnetic field B. Its potential energy is:
A.
U = m × B
B.
U = mB sin θ
C.
U = -m · B = -mB cos θ
D.
U = mB
😑 View Answer Rough Work Error
ANSWER :
C. U = -m · B = -mB cos θ
11.
Stable equilibrium of a magnetic dipole in magnetic field occurs when:
A.
m is parallel to B (θ = 0°)
B.
m is antiparallel to B (θ = 180°)
C.
m is perpendicular to B
D.
m is zero
😑 View Answer Rough Work Error
ANSWER :
A. m is parallel to B (θ = 0°)
12.
Unstable equilibrium of a magnetic dipole in magnetic field occurs when:
A.
θ = 45°
B.
θ = 90°
C.
θ = 0°
D.
θ = 180° (antiparallel to B)
😑 View Answer Rough Work Error
ANSWER :
D. θ = 180° (antiparallel to B)