Write the expression for the force `vecF`, acting on a charged particle of charge q moving with a velocity `vecv` in the pressure of both electric field `vecE` and magnetic field `vecB`. Obtain the condition under which the particle moves undeflected through the fields.

(a) Write the expression for the force, vecF , acting on a charged particle of charge 'q', moving with a velocity vecV in the presence of both electric field vecE and magnetic field vecB . Obtain the condition under which the particle moves undeflected through the fields. (b) A rectangular loop of size lxxb carrying a steady current I is placed in a uniform magnetic field vecB . Prove that the torque vectau acting on the loop is given by vectau=vecmxxvecB," where "vecm is the magnetic moment of the loop.

Write the expression for the force vecF acting on a particle of charge q moving with a velocity vecv in the prensnece of both electric field vecE and magnetic field vecB . Obtain the condition under which the particle moves undeflected through the fields.

Write the expression for the magnetic force acting on a, charged particle moving with velocity v in the presence of magnetic field B.

What is the direction of the force acting on a charged particle q, moving with velocity vec v in a uniform magnetic field?