Choose the correct statement.

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(D) Statement $A$ is correct: $A$ current loop in a uniform magnetic field experiences a torque $\vec{	au} = \vec{m} 	imes \vec{B}$. If the magnetic

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All of these.

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(D) Statement $A$ is correct: $A$ current loop in a uniform magnetic field experiences a torque $\vec{	au} = \vec{m} 	imes \vec{B}$. If the magnetic moment $\vec{m}$ is parallel or anti-parallel to the magnetic field $\vec{B}$,the torque is zero,and the loop remains in equilibrium without rotating.Statement $B$ is correct: For a charged particle to describe a complete circle,the entire circular path must lie within the region of the uniform magnetic field. If the field is confined to a cubical region,a particle entering from outside will exit the field before completing a full circle.Statement $C$ is correct: Although the magnetic force $\vec{F} = q(\vec{v} 	imes \vec{B})$ does no work on a charged particle (speed remains constant),the particle is constantly changing direction. Since velocity is a vector,a change in direction implies an acceleration $(\vec{a} = \frac{\vec{F}}{m} 
eq 0)$.Since all statements are correct,the correct option is $D$.

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