Au-shaped electromagnet of length l, a pole separation d, and permeability m has a square cross section of area a. it is wound with n turns of wire carrying a current i. calculate the force with which the magnet holds a bar of the same material, of same cross section, against its poles.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

resonant frequency

where is the photo and the answer choices?

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards