Which among the following pair is an example of paramagnetic and ferromagnetic substances?

Which one of the following is an electric conductor?

With regard to the magnetic field lines, which one among the following statements is NOT correct?

Which one of the following statements regarding magnetic field is NOT correct ?

Which of the following is the correct match?

A charged particle moves through a magnetic field B with a velocity v. Which one of the following statements is true for the force (F) experienced by the particle?