When a current carrying coil is placed in a uniform magnetic field with its magnetic moment anti-parallel to the field
torque on it is maximum
dipole is in unstable equilibrium
torque on it is zero
potential energy is maximum
A
torque on it is zero
B
torque on it is maximum
C
potential energy is maximum
D
dipole is in unstable equilibrium
Open in App
Solution
Verified by Toppr
Given, →M∦→B, It is anti parallel. ∴→M×→B=0 since angle is 180∘ Potential energy U=−→M.→B=−MBcos180∘=MB×1=MB Potential energy is maximum is an equilibrium but is an unstable equilibrium.
Was this answer helpful?
0
Similar Questions
Q1
When a current carrying coil is placed in a uniform magnetic field with its magnetic moment anti-parallel to the field
View Solution
Q2
When a current -carrying coil is placed in a uniform magnetic field with its magnetic momentum anti-parallel to the field .
View Solution
Q3
A current carrying loop whose magnetic moment is at 30∘ with a uniform external magnetic field of 0.16T experiences a torque of magnitude 0.032Nm. If the coil is free to rotate, its potential energies when it is in stable and unstable equilibrium are respectively
View Solution
Q4
A flat coil carrying a current has a magnetic moment →μ. It is placed in a magnetic field →B. The torque on the coil is →τ
View Solution
Q5
A current carrying coil is placed in a constant uniform magnetic field B. Torque is maximum on this coil when plane of coil is:-