Recent content by Sukuya

What I wasn't able to convince myself was that there was air between the block and the surface, which tantamounts to air only pushing it down. Of course the g we take is the effective g taking into consideration of Earth's rotational effects as well as variation with height/depths etc.

Yes, like this one. The link says : "In the space between it and the pole pieces, where the coil moves freely, the soft iron cylinder makes the magnetic field stronger and radial such that into whatever position the coil rotates, the magnetic field is always parallel to its plane."...

In a galvanometer the magnetic poles are cut in such a fashion which ensures radial magnetic field. If field is radial then the angle between magnetic moment i.e Area vector of the coil and field is zero. Thus the coil should not experience any torque when current is passed through the coil...

Two long parallel wires carrying current I attract each other. Let's say we let them free to move then they will accelerate towards each other, thereby increasing the kinetic energy of the wires. But we know that magnetic forces can't do work on a system. Then how can magnetic force increase...

1. Suppose a cube of mass m is lying at rest on a horizontal surface. The area of one face of the cube is A. For the equlibrium of cube no net force acts on it. If we consider the vertical direction then the contact force N should be equal to the force due to gravity plus the force due to...