Write the expression for the Lorentz force Fin vector form.

Write the expression for the moment of force about a given axis.

Write the expression for the magnetic force vecF acting on a charged particle q moving with vec upsilon in the presence of the magnetic field vec B in a vector form. Show that no work is done and no change in the magnitude of the velocity of the particle is produced by this force. Hence define the unit of magnetic field.

Write the expression for Lorentz magnetic force on a particle of charges 'q' moving with velocity overset(rightarrow)v in a magnetic field overset(rightarrow)B .

Write the expression for arithmetic growth.

(i) Write the expression for the magnetic moment (vecm) due to a planar square loop of side 'l' carrying a steady current I in a vector form. (ii) In figure., this loop is placed in a horizontal plane near a long straight conductor carrying a steady current I_1 at a distance l as shown. Give reasons to explain that the loop will experience a net force but no torque. Write the expression for this force acting on the loop.

Write down the expression for the stationary wave.

Write an expression for the work done when a force is acting on an object in the direction of its displacement.

A Force F acts on a body and displaces it by a distance S in direction at an angle theta with the direction of force ,(a) Write the expression for the work done by the force,(b)What should be the angle between the force and displacement so that the work done is (i)zero ,(ii)Maximum ?

State the Lorenz's force and express it in vector form. Which pair of vectors are always perpendicular to each other? Derive the expression for the force acting on a current carrying conductor of length L in a uniform magnetic field 'B'.

(a) Write law of parallelogram of vector and obtain the expression for the resultant of two vectors acting in two different directions.