We know that charged objects with the same sign repel each other and objects charged with opposite signs attract. what happens when a charged insulating object is brought near an uncharged conducting object without touching it? the conductor remains uncharged and no force is exerted on it. the conductor becomes charged and no force is exerted on it the conductor remains uncharged and a force is exerted on it.

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

In a system, when potential energy decreases, then entropy also decreases. true false