NEET Chemistry The Solid State Electrical And Magnetic Properties MCQs

A thin, uniformly charged ring of radius 'R' carries a total charge 'Q'. A small test charge 'q' is placed on the axis of the ring at a distance 'x' from the center. If $x >> R$, the force experienced by the test charge is proportional to:

Two identical magnetic dipoles of magnetic moment 'm' are placed at a distance 'r' apart, with their axes perpendicular to each other. The force between them is proportional to:

A charged particle enters a region with crossed electric and magnetic fields $\vec{E}$ and $\vec{B}$ such that its velocity $\vec{v}$ is perpendicular to both. If the particle passes undeflected, the magnitude of its velocity is:

A long solenoid with 'n' turns per unit length carries a current 'I'. A charged particle of mass 'm' and charge 'q' moves within the solenoid in a circle of radius 'r' perpendicular to the solenoid's axis. The speed of the particle is:

A square loop of side 'a' carrying current 'I' is placed in a uniform magnetic field 'B' such that the normal to the loop makes an angle $heta$ with the field. The torque experienced by the loop is:

A conducting rod of length 'l' is rotated about one end in a plane perpendicular to a uniform magnetic field 'B' with an angular velocity $\omega$. The induced emf across the rod is:

Which of the following is a diamagnetic material?

The magnetic susceptibility of a paramagnetic substance is:

The unit of electric dipole moment is:

Which of the following is not a property of a conductor in electrostatic equilibrium?