What is the shape of the magnetic field lines around a current carrying straight wire?

Draw magnetic field lines in and around a current carrying straight solenoid.

What is the value of magnetic field around a current carrying torroid?

Draw the pattern of magnetic field lines around a current carrying straight conductor.How does the strength of magnetic field produce change with an increase in current in a conductor?

What is the shape of the magnetic field lines due to a straight current carrying conductor ?

On what factor does the direction of the magnetic field produced by a current - carrying straight wire depend ?