Magnetic Effects of Current

Under what condition does an electron moving
through a magnetic field experience maximum
force ?

Under what conditions is the force acting on a
charge moving through a uniform magnetic
field minimum ?

An electron beam projected along + X-axis,
experiences a force due to a magnetic field
along the +Y-axis. What is the direction of
the magnetic field ?

Write the S.I. unit of magnetic flux.
[Delhi 2005C]

Name the physical quantity whose S.I. unit is
Weber. Is it a scalar or a vector quantity ?
[Delhi 2005C]

Name the physical quantity whose S.I. unit is
Wb-nr2. Is it a scalar or a vector quantity ?
[Delhi 2000C, 05C]